diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index adc101a..8d8e988 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@ericblade/quagga2": "^1.8.4",
-        "@tanstack/react-query": "^5.59.15",
+        "@tanstack/react-query": "^5.52.1",
         "@tanstack/react-table": "^8.20.5",
         "@testing-library/jest-dom": "^5.17.0",
         "@testing-library/react": "^13.4.0",
@@ -22,7 +22,6 @@
         "date-fns": "^3.6.0",
         "fast-xml-parser": "^4.5.0",
         "history": "^5.3.0",
-        "jest-canvas-mock": "^2.5.2",
         "react": "^18.3.1",
         "react-bootstrap": "^2.10.4",
         "react-dom": "^18.3.1",
@@ -3728,9 +3727,9 @@
       }
     },
     "node_modules/@tanstack/query-core": {
-      "version": "5.59.13",
-      "resolved": "https://registry.npmjs.org/@tanstack/query-core/-/query-core-5.59.13.tgz",
-      "integrity": "sha512-Oou0bBu/P8+oYjXsJQ11j+gcpLAMpqW42UlokQYEz4dE7+hOtVO9rVuolJKgEccqzvyFzqX4/zZWY+R/v1wVsQ==",
+      "version": "5.56.2",
+      "resolved": "https://registry.npmjs.org/@tanstack/query-core/-/query-core-5.56.2.tgz",
+      "integrity": "sha512-gor0RI3/R5rVV3gXfddh1MM+hgl0Z4G7tj6Xxpq6p2I03NGPaJ8dITY9Gz05zYYb/EJq9vPas/T4wn9EaDPd4Q==",
       "license": "MIT",
       "funding": {
         "type": "github",
@@ -3738,12 +3737,12 @@
       }
     },
     "node_modules/@tanstack/react-query": {
-      "version": "5.59.15",
-      "resolved": "https://registry.npmjs.org/@tanstack/react-query/-/react-query-5.59.15.tgz",
-      "integrity": "sha512-QbVlAkTI78wB4Mqgf2RDmgC0AOiJqer2c5k9STOOSXGv1S6ZkY37r/6UpE8DbQ2Du0ohsdoXgFNEyv+4eDoPEw==",
+      "version": "5.56.2",
+      "resolved": "https://registry.npmjs.org/@tanstack/react-query/-/react-query-5.56.2.tgz",
+      "integrity": "sha512-SR0GzHVo6yzhN72pnRhkEFRAHMsUo5ZPzAxfTMvUxFIDVS6W9LYUp6nXW3fcHVdg0ZJl8opSH85jqahvm6DSVg==",
       "license": "MIT",
       "dependencies": {
-        "@tanstack/query-core": "5.59.13"
+        "@tanstack/query-core": "5.56.2"
       },
       "funding": {
         "type": "github",
@@ -6656,12 +6655,6 @@
         "node": ">=4"
       }
     },
-    "node_modules/cssfontparser": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/cssfontparser/-/cssfontparser-1.2.1.tgz",
-      "integrity": "sha512-6tun4LoZnj7VN6YeegOVb67KBX/7JJsqvj+pv3ZA7F878/eN33AbGa5b/S/wXxS/tcp8nc40xRUrsPlxIyNUPg==",
-      "license": "MIT"
-    },
     "node_modules/cssnano": {
       "version": "5.1.15",
       "resolved": "https://registry.npmjs.org/cssnano/-/cssnano-5.1.15.tgz",
@@ -10617,16 +10610,6 @@
         }
       }
     },
-    "node_modules/jest-canvas-mock": {
-      "version": "2.5.2",
-      "resolved": "https://registry.npmjs.org/jest-canvas-mock/-/jest-canvas-mock-2.5.2.tgz",
-      "integrity": "sha512-vgnpPupjOL6+L5oJXzxTxFrlGEIbHdZqFU+LFNdtLxZ3lRDCl17FlTMM7IatoRQkrcyOTMlDinjUguqmQ6bR2A==",
-      "license": "MIT",
-      "dependencies": {
-        "cssfontparser": "^1.2.1",
-        "moo-color": "^1.0.2"
-      }
-    },
     "node_modules/jest-changed-files": {
       "version": "27.5.1",
       "resolved": "https://registry.npmjs.org/jest-changed-files/-/jest-changed-files-27.5.1.tgz",
@@ -12164,15 +12147,6 @@
         "mkdirp": "bin/cmd.js"
       }
     },
-    "node_modules/moo-color": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/moo-color/-/moo-color-1.0.3.tgz",
-      "integrity": "sha512-i/+ZKXMDf6aqYtBhuOcej71YSlbjT3wCO/4H1j8rPvxDJEifdwgg5MaFyu6iYAT8GBZJg2z0dkgK4YMzvURALQ==",
-      "license": "MIT",
-      "dependencies": {
-        "color-name": "^1.1.4"
-      }
-    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index c201ae0..c1ddcba 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -5,7 +5,7 @@
   "proxy": "http://localhost:3001",
   "dependencies": {
     "@ericblade/quagga2": "^1.8.4",
-    "@tanstack/react-query": "^5.59.15",
+    "@tanstack/react-query": "^5.52.1",
     "@tanstack/react-table": "^8.20.5",
     "@testing-library/jest-dom": "^5.17.0",
     "@testing-library/react": "^13.4.0",
@@ -18,7 +18,6 @@
     "date-fns": "^3.6.0",
     "fast-xml-parser": "^4.5.0",
     "history": "^5.3.0",
-    "jest-canvas-mock": "^2.5.2",
     "react": "^18.3.1",
     "react-bootstrap": "^2.10.4",
     "react-dom": "^18.3.1",
@@ -32,7 +31,7 @@
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
-    "test": "react-scripts test --testPathPattern='(/__tests__/.*|(\\.|/)(test|spec))\\.[jt]sx?$'",
+    "test": "react-scripts test",
     "eject": "react-scripts eject"
   },
   "eslintConfig": {
diff --git a/frontend/src/App.test.tsx b/frontend/src/App.test.tsx
new file mode 100644
index 0000000..2a68616
--- /dev/null
+++ b/frontend/src/App.test.tsx
@@ -0,0 +1,9 @@
+import React from 'react';
+import { render, screen } from '@testing-library/react';
+import App from './App';
+
+test('renders learn react link', () => {
+  render(<App />);
+  const linkElement = screen.getByText(/learn react/i);
+  expect(linkElement).toBeInTheDocument();
+});
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 20e1772..cb17589 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -50,7 +50,7 @@ function App() {
         height: "100vh",
         width: "100vw",
         fontFamily: "New Amsterdam",
-        overflow: "hidden",
+        overflow: "scroll",
       }}
     >
       <AuthContext.Provider value={{ authenticated, setAuthenticated }}>
diff --git a/frontend/src/index.css b/frontend/src/index.css
index 898d521..d5518dc 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -19,7 +19,7 @@ body {
   .btn-primary {
     background-color: #5e6268;
     color: #f2f3f4;
-    border: 1px solid #5e6268;
+    border: 2px solid #5e6268;
   }
 
   form-control {
@@ -91,16 +91,6 @@ body {
     border: 2px solid #f2f2e8;
   }
 
-  .form-select {
-    background-color: #f2f2e8 !important;
-    color: #5e6268 !important;
-    border: 2px solid #f2f2e8;
-  }
-
-  .primary {
-    color: #5e6268 !important;
-  }
-
   .danger {
     background-color: #f9a9ab !important;
   }
@@ -133,7 +123,7 @@ body {
     .btn-primary {
       background-color: #f2f3f4;
       color: #5e6268;
-      border-left: 1px solid #5e6268;
+      border: 2px solid #5e6268;
     }
 
     .form-control {
@@ -160,18 +150,17 @@ body {
       letter-spacing: normal;
     }
 
-    tbody > tr > td {
-      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
-        "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans",
-        "Helvetica Neue", sans-serif !important;
-    }
-
     .table > :not(caption) > * > * {
       background-color: #5e6268 !important;
       color: #f2f2e8 !important;
     }
 
-    table > thead {
+    table {
+      tbody > td > div {
+        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
+          "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans",
+          "Helvetica Neue", sans-serif !important;
+      }
       letter-spacing: 0.25em;
     }
 
@@ -189,16 +178,6 @@ body {
       border: 2px solid #5e6268;
     }
 
-    .form-select {
-      background-color: #f2f2e8 !important;
-      color: #5e6268 !important;
-      border: 2px solid #f2f2e8;
-    }
-
-    .primary {
-      color: #f2f2e8 !important;
-    }
-
     .dropdown-item {
       color: #f2f2e8 !important;
       svg {
diff --git a/frontend/src/pages/Library/Library.tsx b/frontend/src/pages/Library/Library.tsx
index 76f5101..0aaaae8 100644
--- a/frontend/src/pages/Library/Library.tsx
+++ b/frontend/src/pages/Library/Library.tsx
@@ -232,7 +232,7 @@ export const Library = (): React.JSX.Element => {
       <div
         style={{
           maxWidth: "100%",
-          maxHeight: "80vh",
+          maxHeight: "70vh",
           overflow: "auto",
           marginBottom: "5px",
         }}
diff --git a/frontend/src/pages/Library/components/Pagination.tsx b/frontend/src/pages/Library/components/Pagination.tsx
index 240f3c2..ee7b531 100644
--- a/frontend/src/pages/Library/components/Pagination.tsx
+++ b/frontend/src/pages/Library/components/Pagination.tsx
@@ -1,7 +1,6 @@
 import React, { useCallback } from "react";
 import { Pagination as BP } from "react-bootstrap";
 import { AiOutlineLeft, AiOutlineRight } from "react-icons/ai";
-import { useAuth } from "../../../shared/utils/useAuthentication";
 
 export const Pagination = ({
   currentPage,
@@ -12,8 +11,6 @@ export const Pagination = ({
   getPageCount: () => number;
   setPageIndex: (index: number) => void;
 }): React.JSX.Element => {
-  const { authenticated } = useAuth();
-
   const getPage = useCallback(
     (n: number) => (
       <BP.Item
@@ -32,7 +29,7 @@ export const Pagination = ({
       className='d-flex'
       style={{
         marginLeft: "auto",
-        marginRight: authenticated ? "10px" : "auto",
+        marginRight: "10px",
       }}
     >
       <BP.Item
diff --git a/frontend/src/pages/Main/utils/__tests__/tryDeutscheNationalBibliothekApi.test.ts b/frontend/src/pages/Main/utils/__tests__/tryDeutscheNationalBibliothekApi.test.ts
deleted file mode 100644
index 808657e..0000000
--- a/frontend/src/pages/Main/utils/__tests__/tryDeutscheNationalBibliothekApi.test.ts
+++ /dev/null
@@ -1,72 +0,0 @@
-import { cleanup } from "@testing-library/react";
-import { tryDeutscheNationalBibliothekApi } from "../tryDeutscheNationalBibliothekApi";
-
-const dnbBookMock = {
-  text: () =>
-    `<?xml version="1.0" encoding="UTF-8"?>
-        <searchRetrieveResponse xmlns="http://www.loc.gov/zing/srw/"><version>1.1</version><numberOfRecords>1</numberOfRecords><records><record><recordSchema>RDFxml</recordSchema><recordPacking>xml</recordPacking><recordData><rdf:RDF xmlns:schema="http://schema.org/" xmlns:gndo="https://d-nb.info/standards/elementset/gnd#" xmlns:lib="http://purl.org/library/" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:editeur="https://ns.editeur.org/thema/" xmlns:geo="http://www.opengis.net/ont/geosparql#" xmlns:umbel="http://umbel.org/umbel#" xmlns:naf="https://id.loc.gov/authorities/names/" xmlns:rdau="http://rdaregistry.info/Elements/u/" xmlns:sf="http://www.opengis.net/ont/sf#" xmlns:bflc="http://id.loc.gov/ontologies/bflc/" xmlns:thesoz="http://lod.gesis.org/thesoz/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:isbd="http://iflastandards.info/ns/isbd/elements/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:mesh="http://id.nlm.nih.gov/mesh/vocab#" xmlns:ram="https://data.bnf.fr/ark:/12148/" xmlns:mo="http://purl.org/ontology/mo/" xmlns:marcRole="http://id.loc.gov/vocabulary/relators/" xmlns:agrelon="https://d-nb.info/standards/elementset/agrelon#" xmlns:dcmitype="http://purl.org/dc/dcmitype/" xmlns:nsogg="https://purl.org/bncf/tid/" xmlns:dnbt="https://d-nb.info/standards/elementset/dnb#" xmlns:dbp="http://dbpedia.org/property/" xmlns:embne="https://datos.bne.es/resource/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dnb_intern="http://dnb.de/" xmlns:madsrdf="http://www.loc.gov/mads/rdf/v1#" xmlns:cidoc="http://www.cidoc-crm.org/cidoc-crm/" xmlns:dcatde="http://dcat-ap.de/def/dcatde/" xmlns:v="http://www.w3.org/2006/vcard/ns#" xmlns:ebu="http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#" xmlns:wdrs="http://www.w3.org/2007/05/powder-s#" xmlns:gbv="http://purl.org/ontology/gbv/" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:agrovoc="https://aims.fao.org/aos/agrovoc/" xmlns:lcsh="https://id.loc.gov/authorities/subjects/" xmlns:dc="http://purl.org/dc/elements/1.1/">
-        <rdf:Description rdf:about="https://d-nb.info/962361321">
-	    <rdf:type rdf:resource="http://purl.org/ontology/bibo/Document"/>
-	    <dcterms:medium rdf:resource="http://rdaregistry.info/termList/RDACarrierType/1044"/>
-	    <rdau:P60049 rdf:resource="http://rdaregistry.info/termList/RDAContentType/1020"/>
-	    <rdau:P60050 rdf:resource="http://rdaregistry.info/termList/RDAMediaType/1007"/>
-	    <rdau:P60048 rdf:resource="http://rdaregistry.info/termList/RDACarrierType/1049"/>
-	    <dc:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">(DE-101)962361321</dc:identifier>
-	    <bibo:isbn13 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">9783898641227</bibo:isbn13>
-	    <rdau:P60521 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Pp. : DM 79.00, EUR 41.00 (ab 1.1.2002), sfr 70.00, S 577.00</rdau:P60521>
-	    <bibo:isbn10 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">3898641228</bibo:isbn10>
-	    <rdau:P60521 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Pp. : DM 79.00, EUR 41.00 (ab 1.1.2002), sfr 70.00, S 577.00</rdau:P60521>
-	    <dc:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">(OCoLC)76300394</dc:identifier>
-	    <rdau:P60049 rdf:resource="https://d-nb.info/gnd/4123623-3"/>
-	    <rdau:P60327 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Gunter Saake ; Kai-Uwe Sattler</rdau:P60327>
-
-	    <dc:title rdf:datatype="http://www.w3.org/2001/XMLSchema#string">mockedbook</dc:title>
-
-	    <dcterms:creator rdf:resource="https://d-nb.info/gnd/122164458"/>
-	    <marcRole:aut rdf:resource="https://d-nb.info/gnd/122164458"/>
-	    <marcRole:aut rdf:resource="https://d-nb.info/gnd/120420392"/>
-	    <bibo:edition rdf:datatype="http://www.w3.org/2001/XMLSchema#string">1. Aufl.</bibo:edition>
-	    <dc:publisher rdf:datatype="http://www.w3.org/2001/XMLSchema#string">dpunkt-Verl.</dc:publisher>
-	    <rdau:P60163 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Heidelberg</rdau:P60163>
-	    <rdau:P60333 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Heidelberg : dpunkt-Verl.</rdau:P60333>
-	    <rdau:P60539 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">25 cm</rdau:P60539>
-	    <rdau:P60470 xml:lang="de">Ill.</rdau:P60470>
-	    <rdau:P60470 xml:lang="de">Literaturverz. S. 483 - 486</rdau:P60470>
-	    <dcterms:subject rdf:resource="https://d-nb.info/gnd/4011146-5"/>
-	    <dcterms:subject rdf:resource="https://d-nb.info/gnd/4401313-9"/>
-	    <dcterms:subject rdf:resource="https://d-nb.info/gnd/4001183-5"/>
-	    <dcterms:subject rdf:resource="https://d-nb.info/gnd/4401313-9"/>
-	    <dcterms:tableOfContents rdf:resource="https://d-nb.info/962361321/04"/>
-	    <wdrs:describedby>
-		    <rdf:Description rdf:about="https://d-nb.info/962361321/about">
-		    	<dcterms:license rdf:resource="http://creativecommons.org/publicdomain/zero/1.0/"/>
-		    	<dcterms:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2024-10-13T04:31:46.000</dcterms:modified>
-		    </rdf:Description>
-	    </wdrs:describedby>
-
-	    <dcterms:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#string">2024</dcterms:issued>
-
-	    <rdau:P60493 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">eine Einführung mit Java</rdau:P60493>
-	    <isbd:P1053 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">XVI, 494 S.</isbd:P1053>
-	    <owl:sameAs rdf:resource="http://hub.culturegraph.org/resource/DNB-962361321"/>
-    </rdf:Description>
-    </rdf:RDF></recordData><recordPosition>1</recordPosition></record></records><echoedSearchRetrieveRequest><version>1.1</version><query>9783898641227</query><xQuery xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/></echoedSearchRetrieveRequest></searchRetrieveResponse>`,
-};
-
-describe("tryDeutscheNationalBibliothekApi", () => {
-  it("should parse dnb response to book", async () => {
-    global.fetch = jest.fn(() => Promise.resolve(dnbBookMock)) as jest.Mock;
-
-    const book = await tryDeutscheNationalBibliothekApi("mocked-isbn");
-
-    expect(book).toStrictEqual({
-      published: 2024,
-      title: "mockedbook",
-    });
-  });
-
-  afterAll(() => {
-    jest.clearAllMocks();
-    cleanup();
-  });
-});
diff --git a/frontend/src/pages/Main/utils/__tests__/tryGoogleBooksApi.test.ts b/frontend/src/pages/Main/utils/__tests__/tryGoogleBooksApi.test.ts
deleted file mode 100644
index 5e93a95..0000000
--- a/frontend/src/pages/Main/utils/__tests__/tryGoogleBooksApi.test.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-import { cleanup } from "@testing-library/react";
-import { tryGoogleBooksApi } from "../tryGoogleBooksApi";
-
-const goolgeBooksMock = {
-  json: () => ({
-    items: [
-      {
-        volumeInfo: {
-          publishedDate: "2024-10-31",
-          title: "mockedbook",
-        },
-      },
-    ],
-  }),
-};
-
-describe("tryGoogleBooksApi", () => {
-  it("should parse google response to book", async () => {
-    global.fetch = jest.fn(() => Promise.resolve(goolgeBooksMock)) as jest.Mock;
-
-    const book = await tryGoogleBooksApi("mocked-isbn");
-
-    expect(book).toStrictEqual({
-      published: "2024",
-      title: "mockedbook",
-    });
-  });
-
-  afterAll(() => {
-    jest.clearAllMocks();
-    cleanup();
-  });
-});
diff --git a/frontend/src/shared/components/modals/BookModal.tsx b/frontend/src/shared/components/modals/BookModal.tsx
index 0c7ced6..8ae20ce 100644
--- a/frontend/src/shared/components/modals/BookModal.tsx
+++ b/frontend/src/shared/components/modals/BookModal.tsx
@@ -1,14 +1,13 @@
 import React, { useCallback, useEffect, useState } from "react";
 import { Button, Col, Form, Modal, Row } from "react-bootstrap";
-import { ImBook, ImCamera, ImCancelCircle } from "react-icons/im";
+import { ImBook, ImCamera } from "react-icons/im";
 import { ModalHeader } from "./ModalHeader";
 import { useForm, useWatch } from "react-hook-form";
-import { Book } from "../../../types/Book";
+import { Book, bookShelfs } from "../../../types/Book";
 import { useScanner } from "../../utils/useScanner";
 import { BookModalProps } from "./types";
 import { tryGoogleBooksApi } from "../../../pages/Main/utils/tryGoogleBooksApi";
 import { tryDeutscheNationalBibliothekApi } from "../../../pages/Main/utils/tryDeutscheNationalBibliothekApi";
-import { useQuery } from "@tanstack/react-query";
 
 type BookForm = Pick<Book, "isbn" | "title" | "shelf" | "published">;
 
@@ -20,19 +19,6 @@ export const BookModal = ({
   const isEdit = !!book;
   const [showScanner, setShowScanner] = useState(false);
 
-  const [addNew, setAddNew] = useState<boolean>(false);
-
-  const { data: shelves, isLoading } = useQuery<string[]>({
-    queryFn: async () => {
-      const response = await fetch(`/api/shelves/list`);
-      const data = await response.text();
-      return data
-        .split(",")
-        .map((s) => s.replaceAll('"', "").replace("[", "").replace("]", ""));
-    },
-    queryKey: ["shleves"],
-  });
-
   const { control, register, formState, setError, setValue, reset } =
     useForm<BookForm>({
       mode: "onChange",
@@ -98,7 +84,7 @@ export const BookModal = ({
       }
       if (error) return;
       const createdBook = await fetch(
-        isEdit ? "/api/books/edit" : "/api/books/create",
+        isEdit ? "api/books/edit" : "/api/books/create",
         {
           method: "POST",
           body: JSON.stringify(data),
@@ -227,52 +213,22 @@ export const BookModal = ({
                 <Form.Label>Shelf</Form.Label>
               </Col>
               <Col>
-                {!isLoading &&
-                  (addNew ? (
-                    <div className='d-flex'>
-                      <Form.Control
-                        id='move-shelf-text-input'
-                        {...register("shelf", { required: true })}
-                        style={{
-                          borderRadius: "5px 0px 0px 5px",
-                        }}
-                      />
-                      <Button
-                        style={{
-                          borderRadius: "0px 5px 5px 0px",
-                        }}
-                        className='d-flex mr-2 pt-2'
-                        onClick={() => setAddNew(false)}
-                      >
-                        <div className='m-auto'>
-                          <ImCancelCircle size={20} />
-                        </div>
-                      </Button>
-                    </div>
-                  ) : (
-                    <Form.Select
-                      id='move-shelf-select'
-                      {...register("shelf", {
-                        required: true,
-                        onChange: (ev) => {
-                          if (ev.target.value === "addNew") {
-                            setAddNew(true);
-                          }
-                        },
-                      })}
-                      isInvalid={!!formState.errors.shelf}
+                <Form.Select
+                  {...register("shelf", { required: true })}
+                  isInvalid={!!formState.errors.shelf}
+                >
+                  {Object.keys(bookShelfs).map((key) => (
+                    <option
+                      key='key'
+                      value={bookShelfs[key as keyof typeof bookShelfs]}
                     >
-                      {shelves?.map((shelf) => (
-                        <option key='key' value={shelf}>
-                          {shelf}
-                        </option>
-                      ))}
-                      <option value='addNew'>Add new</option>
-                    </Form.Select>
+                      {key}
+                    </option>
                   ))}
+                </Form.Select>
                 <Form.Control.Feedback type='invalid'>
                   {!values.shelf
-                    ? "Target shelf is required"
+                    ? "Shelf is required"
                     : formState.errors.shelf?.message}
                 </Form.Control.Feedback>
               </Col>
diff --git a/frontend/src/shared/components/modals/MoveShelfModal.tsx b/frontend/src/shared/components/modals/MoveShelfModal.tsx
index fe58fbe..133c94a 100644
--- a/frontend/src/shared/components/modals/MoveShelfModal.tsx
+++ b/frontend/src/shared/components/modals/MoveShelfModal.tsx
@@ -1,10 +1,10 @@
-import { useMutation, useQuery } from "@tanstack/react-query";
+import { useMutation } from "@tanstack/react-query";
 import { Button, Col, Form, Modal, Row } from "react-bootstrap";
-import { ImBook, ImCancelCircle } from "react-icons/im";
+import { ImBook } from "react-icons/im";
 import { ModalHeader } from "./ModalHeader";
 import { MoveShelfAction, MoveShelfModalProps } from "./types";
 import { useForm, useWatch } from "react-hook-form";
-import { useState } from "react";
+import { bookShelfs } from "../../../types/Book";
 
 export const MoveShelfModal = ({
   books,
@@ -20,7 +20,7 @@ export const MoveShelfModal = ({
   const { mutate: mv } = useMutation({
     mutationFn: async () => {
       if (!values.target) {
-        setError("target", { message: "Target shelf is required" });
+        setError("target", { message: "Taget shelf is required" });
         return;
       }
 
@@ -35,19 +35,6 @@ export const MoveShelfModal = ({
     },
   });
 
-  const { data: shelves, isLoading } = useQuery<string[]>({
-    queryFn: async () => {
-      const response = await fetch(`/api/shelves/list`);
-      const data = await response.text();
-      return data
-        .split(",")
-        .map((s) => s.replaceAll('"', "").replace("[", "").replace("]", ""));
-    },
-    queryKey: ["shleves"],
-  });
-
-  const [addNew, setAddNew] = useState<boolean>(false);
-
   return (
     <Modal show={open} onHide={onClose} centered>
       <ModalHeader
@@ -61,50 +48,23 @@ export const MoveShelfModal = ({
         }}
       >
         <Form.Group as={Row} className='mb-2'>
-          <Col className='d-flex' sm='2'>
-            <Form.Label className='m-auto'>Shelf</Form.Label>
+          <Col sm='2'>
+            <Form.Label>Shelf</Form.Label>
           </Col>
           <Col>
-            {!isLoading &&
-              (addNew ? (
-                <div className='d-flex'>
-                  <Form.Control
-                    id='move-shelf-text-input'
-                    {...register("target", { required: true })}
-                  />
-                  <Button
-                    style={{
-                      background: "transparent",
-                      marginLeft: "0px",
-                      marginRight: "10px",
-                    }}
-                    className='d-flex m-auto'
-                    onClick={() => setAddNew(false)}
-                  >
-                    <ImCancelCircle className='m-auto primary' size={20} />
-                  </Button>
-                </div>
-              ) : (
-                <Form.Select
-                  id='move-shelf-select'
-                  {...register("target", {
-                    required: true,
-                    onChange: (ev) => {
-                      if (ev.target.value === "addNew") {
-                        setAddNew(true);
-                      }
-                    },
-                  })}
-                  isInvalid={!!formState.errors.target}
+            <Form.Select
+              {...register("target", { required: true })}
+              isInvalid={!!formState.errors.target}
+            >
+              {Object.keys(bookShelfs).map((key) => (
+                <option
+                  key='key'
+                  value={bookShelfs[key as keyof typeof bookShelfs]}
                 >
-                  {shelves?.map((shelf) => (
-                    <option key='key' value={shelf}>
-                      {shelf}
-                    </option>
-                  ))}
-                  <option value='addNew'>Add new</option>
-                </Form.Select>
+                  {key}
+                </option>
               ))}
+            </Form.Select>
             <Form.Control.Feedback type='invalid'>
               {!values.target
                 ? "Target shelf is required"
diff --git a/frontend/src/shared/components/modals/__tests__/AuthenticationModal.test.tsx b/frontend/src/shared/components/modals/__tests__/AuthenticationModal.test.tsx
deleted file mode 100644
index ad856f6..0000000
--- a/frontend/src/shared/components/modals/__tests__/AuthenticationModal.test.tsx
+++ /dev/null
@@ -1,26 +0,0 @@
-import { render } from "@testing-library/react";
-import { AuthenticationModal } from "../AuthenticationModal";
-
-describe("AuthenticationModal", () => {
-  it("renders as admin verification correctly", () => {
-    const view = render(
-      <AuthenticationModal
-        open={true}
-        onClose={() => undefined}
-        isUpdate={false}
-      />
-    );
-    expect(view.baseElement).toMatchSnapshot();
-  });
-
-  it("renders as admin pw change correctly", () => {
-    const view = render(
-      <AuthenticationModal
-        open={true}
-        onClose={() => undefined}
-        isUpdate={true}
-      />
-    );
-    expect(view.baseElement).toMatchSnapshot();
-  });
-});
diff --git a/frontend/src/shared/components/modals/__tests__/BookModal.test.tsx b/frontend/src/shared/components/modals/__tests__/BookModal.test.tsx
deleted file mode 100644
index b6d8c2c..0000000
--- a/frontend/src/shared/components/modals/__tests__/BookModal.test.tsx
+++ /dev/null
@@ -1,45 +0,0 @@
-import { render } from "@testing-library/react";
-import { BookModal } from "../BookModal";
-import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
-
-describe("BookModal", () => {
-  global.fetch = jest.fn(() =>
-    Promise.resolve({
-      json: () => Promise.resolve({ test: 100 }),
-    })
-  ) as jest.Mock;
-
-  const queryClient = new QueryClient();
-
-  it("renders without a book", () => {
-    const view = render(
-      <QueryClientProvider client={queryClient}>
-        <BookModal open={true} onClose={() => undefined} />
-      </QueryClientProvider>
-    );
-    expect(view.baseElement).toMatchSnapshot();
-  });
-
-  it("sets book as default value", () => {
-    const view = render(
-      <QueryClientProvider client={queryClient}>
-        <BookModal
-          open={true}
-          onClose={() => undefined}
-          book={{
-            id: 1,
-            uuid: "mockedbook",
-            isbn: "123",
-            title: "mockedbook",
-            published: 2024,
-            lastCheckoutDate: null,
-            checkoutBy: null,
-            shelf: "AVAILABLE",
-            contact: null,
-          }}
-        />
-      </QueryClientProvider>
-    );
-    expect(view.baseElement).toMatchSnapshot();
-  });
-});
diff --git a/frontend/src/shared/components/modals/__tests__/__snapshots__/AuthenticationModal.test.tsx.snap b/frontend/src/shared/components/modals/__tests__/__snapshots__/AuthenticationModal.test.tsx.snap
deleted file mode 100644
index cb78b1d..0000000
--- a/frontend/src/shared/components/modals/__tests__/__snapshots__/AuthenticationModal.test.tsx.snap
+++ /dev/null
@@ -1,271 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`AuthenticationModal renders as admin pw change correctly 1`] = `
-<body
-  class="modal-open"
-  data-rr-ui-modal-open=""
-  style="padding-right: 2048px;"
->
-  <div />
-  <div
-    class="fade modal-backdrop show"
-  />
-  <div
-    aria-modal="true"
-    class="fade modal show"
-    role="dialog"
-    style="display: block; padding-right: 0px;"
-    tabindex="-1"
-  >
-    <div
-      class="modal-dialog modal-dialog-centered"
-    >
-      <div
-        class="modal-content"
-      >
-        <div
-          class="modal-header"
-        >
-          <div
-            class="w-100 d-flex modal-title h4"
-          >
-            <svg
-              class="ml-0 mr-auto"
-              fill="currentColor"
-              height="50"
-              stroke="currentColor"
-              stroke-width="0"
-              version="1.1"
-              viewBox="0 0 17 17"
-              width="50"
-              xmlns="http://www.w3.org/2000/svg"
-            >
-              <g />
-              <path
-                d="M14.811 6.299l0.707-0.707-1.733-1.733 0.757-0.753-0.705-0.709-8.146 8.107c-0.484-0.336-1.070-0.535-1.703-0.535-1.654 0-3 1.346-3 3s1.346 3 3 3 3-1.346 3-3c0-0.661-0.222-1.268-0.585-1.764l5.264-5.238 1.738 1.738 0.707-0.707-1.737-1.736 0.701-0.698 1.735 1.735zM3.987 14.969c-1.103 0-2-0.897-2-2s0.897-2 2-2 2 0.897 2 2-0.897 2-2 2z"
-              />
-            </svg>
-            <h2
-              class="m-auto p-2"
-              style="text-align: center;"
-            >
-              Set new Admin key
-            </h2>
-            <button
-              class="ml-auto mr-0 btn btn-primary"
-              type="button"
-            >
-              <svg
-                fill="currentColor"
-                fill-rule="evenodd"
-                height="1em"
-                stroke="currentColor"
-                stroke-width="0"
-                viewBox="0 0 1024 1024"
-                width="1em"
-                xmlns="http://www.w3.org/2000/svg"
-              >
-                <path
-                  d="M799.855 166.312c.023.007.043.018.084.059l57.69 57.69c.041.041.052.06.059.084a.118.118 0 0 1 0 .069c-.007.023-.018.042-.059.083L569.926 512l287.703 287.703c.041.04.052.06.059.083a.118.118 0 0 1 0 .07c-.007.022-.018.042-.059.083l-57.69 57.69c-.041.041-.06.052-.084.059a.118.118 0 0 1-.069 0c-.023-.007-.042-.018-.083-.059L512 569.926 224.297 857.629c-.04.041-.06.052-.083.059a.118.118 0 0 1-.07 0c-.022-.007-.042-.018-.083-.059l-57.69-57.69c-.041-.041-.052-.06-.059-.084a.118.118 0 0 1 0-.069c.007-.023.018-.042.059-.083L454.073 512 166.371 224.297c-.041-.04-.052-.06-.059-.083a.118.118 0 0 1 0-.07c.007-.022.018-.042.059-.083l57.69-57.69c.041-.041.06-.052.084-.059a.118.118 0 0 1 .069 0c.023.007.042.018.083.059L512 454.073l287.703-287.702c.04-.041.06-.052.083-.059a.118.118 0 0 1 .07 0Z"
-                />
-              </svg>
-            </button>
-          </div>
-        </div>
-        <div
-          class="modal-body"
-        >
-          <form
-            class="mb-2"
-          >
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-4"
-              >
-                <label
-                  class="form-label"
-                >
-                  Current Password
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <input
-                  class="form-control"
-                  name="oldPassword"
-                  placeholder="Enter current admin password ..."
-                  type="password"
-                />
-                <div
-                  class="invalid-feedback"
-                >
-                  Old password is required
-                </div>
-              </div>
-            </div>
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-4"
-              >
-                <label
-                  class="form-label"
-                >
-                  New Password
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <input
-                  class="form-control"
-                  name="newPassword"
-                  placeholder="Enter new admin password ..."
-                  type="password"
-                />
-                <div
-                  class="invalid-feedback"
-                >
-                  New password is required
-                </div>
-              </div>
-            </div>
-             
-            <div
-              class="d-flex mx-auto mb-auto mt-2 w-100"
-            >
-              <button
-                class="btn btn-primary"
-                style="border-radius: 5px; margin-left: auto; margin-right: 10px;"
-                type="button"
-              >
-                Send
-              </button>
-            </div>
-          </form>
-        </div>
-      </div>
-    </div>
-  </div>
-</body>
-`;
-
-exports[`AuthenticationModal renders as admin verification correctly 1`] = `
-<body
-  class="modal-open"
-  data-rr-ui-modal-open=""
-  style="padding-right: 1024px;"
->
-  <div />
-  <div
-    class="fade modal-backdrop show"
-  />
-  <div
-    aria-modal="true"
-    class="fade modal show"
-    role="dialog"
-    style="display: block; padding-right: 0px;"
-    tabindex="-1"
-  >
-    <div
-      class="modal-dialog modal-dialog-centered"
-    >
-      <div
-        class="modal-content"
-      >
-        <div
-          class="modal-header"
-        >
-          <div
-            class="w-100 d-flex modal-title h4"
-          >
-            <svg
-              class="ml-0 mr-auto"
-              fill="currentColor"
-              height="50"
-              stroke="currentColor"
-              stroke-width="0"
-              version="1.1"
-              viewBox="0 0 17 17"
-              width="50"
-              xmlns="http://www.w3.org/2000/svg"
-            >
-              <g />
-              <path
-                d="M14.811 6.299l0.707-0.707-1.733-1.733 0.757-0.753-0.705-0.709-8.146 8.107c-0.484-0.336-1.070-0.535-1.703-0.535-1.654 0-3 1.346-3 3s1.346 3 3 3 3-1.346 3-3c0-0.661-0.222-1.268-0.585-1.764l5.264-5.238 1.738 1.738 0.707-0.707-1.737-1.736 0.701-0.698 1.735 1.735zM3.987 14.969c-1.103 0-2-0.897-2-2s0.897-2 2-2 2 0.897 2 2-0.897 2-2 2z"
-              />
-            </svg>
-            <h2
-              class="m-auto p-2"
-              style="text-align: center;"
-            >
-              Admin Login
-            </h2>
-            <button
-              class="ml-auto mr-0 btn btn-primary"
-              type="button"
-            >
-              <svg
-                fill="currentColor"
-                fill-rule="evenodd"
-                height="1em"
-                stroke="currentColor"
-                stroke-width="0"
-                viewBox="0 0 1024 1024"
-                width="1em"
-                xmlns="http://www.w3.org/2000/svg"
-              >
-                <path
-                  d="M799.855 166.312c.023.007.043.018.084.059l57.69 57.69c.041.041.052.06.059.084a.118.118 0 0 1 0 .069c-.007.023-.018.042-.059.083L569.926 512l287.703 287.703c.041.04.052.06.059.083a.118.118 0 0 1 0 .07c-.007.022-.018.042-.059.083l-57.69 57.69c-.041.041-.06.052-.084.059a.118.118 0 0 1-.069 0c-.023-.007-.042-.018-.083-.059L512 569.926 224.297 857.629c-.04.041-.06.052-.083.059a.118.118 0 0 1-.07 0c-.022-.007-.042-.018-.083-.059l-57.69-57.69c-.041-.041-.052-.06-.059-.084a.118.118 0 0 1 0-.069c.007-.023.018-.042.059-.083L454.073 512 166.371 224.297c-.041-.04-.052-.06-.059-.083a.118.118 0 0 1 0-.07c.007-.022.018-.042.059-.083l57.69-57.69c.041-.041.06-.052.084-.059a.118.118 0 0 1 .069 0c.023.007.042.018.083.059L512 454.073l287.703-287.702c.04-.041.06-.052.083-.059a.118.118 0 0 1 .07 0Z"
-                />
-              </svg>
-            </button>
-          </div>
-        </div>
-        <div
-          class="modal-body"
-        >
-          <form
-            class="mb-2"
-          >
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col"
-              >
-                <input
-                  class="form-control"
-                  name="password"
-                  placeholder="Enter admin password ..."
-                  type="password"
-                />
-                <div
-                  class="invalid-feedback"
-                >
-                  Password is required
-                </div>
-              </div>
-            </div>
-            <div
-              class="d-flex mx-auto mb-auto mt-2 w-100"
-            >
-              <button
-                class="btn btn-primary"
-                style="border-radius: 5px; margin-left: auto; margin-right: 10px;"
-                type="button"
-              >
-                Send
-              </button>
-            </div>
-          </form>
-        </div>
-      </div>
-    </div>
-  </div>
-</body>
-`;
diff --git a/frontend/src/shared/components/modals/__tests__/__snapshots__/BookModal.test.tsx.snap b/frontend/src/shared/components/modals/__tests__/__snapshots__/BookModal.test.tsx.snap
deleted file mode 100644
index a3862dd..0000000
--- a/frontend/src/shared/components/modals/__tests__/__snapshots__/BookModal.test.tsx.snap
+++ /dev/null
@@ -1,445 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`BookModal renders without a book 1`] = `
-<body
-  class="modal-open"
-  data-rr-ui-modal-open=""
-  style="padding-right: 1024px;"
->
-  <div />
-  <div
-    class="fade modal-backdrop show"
-  />
-  <div
-    aria-modal="true"
-    class="fade modal show"
-    role="dialog"
-    style="display: block; padding-right: 0px;"
-    tabindex="-1"
-  >
-    <div
-      class="modal-dialog modal-dialog-centered"
-    >
-      <div
-        class="modal-content"
-      >
-        <div
-          class="modal-header"
-        >
-          <div
-            class="w-100 d-flex modal-title h4"
-          >
-            <svg
-              class="ml-0 mr-auto"
-              fill="currentColor"
-              height="50"
-              stroke="currentColor"
-              stroke-width="0"
-              version="1.1"
-              viewBox="0 0 16 16"
-              width="50"
-              xmlns="http://www.w3.org/2000/svg"
-            >
-              <path
-                d="M14 2v13h-10.5c-0.829 0-1.5-0.672-1.5-1.5s0.671-1.5 1.5-1.5h9.5v-12h-10c-1.1 0-2 0.9-2 2v12c0 1.1 0.9 2 2 2h12v-14h-1z"
-              />
-              <path
-                d="M3.501 13v0c-0 0-0.001 0-0.001 0-0.276 0-0.5 0.224-0.5 0.5s0.224 0.5 0.5 0.5c0 0 0.001-0 0.001-0v0h9.498v-1h-9.498z"
-              />
-            </svg>
-            <h2
-              class="m-auto p-2"
-              style="text-align: center;"
-            >
-              Add new Book
-            </h2>
-            <button
-              class="ml-auto mr-0 btn btn-primary"
-              type="button"
-            >
-              <svg
-                fill="currentColor"
-                fill-rule="evenodd"
-                height="1em"
-                stroke="currentColor"
-                stroke-width="0"
-                viewBox="0 0 1024 1024"
-                width="1em"
-                xmlns="http://www.w3.org/2000/svg"
-              >
-                <path
-                  d="M799.855 166.312c.023.007.043.018.084.059l57.69 57.69c.041.041.052.06.059.084a.118.118 0 0 1 0 .069c-.007.023-.018.042-.059.083L569.926 512l287.703 287.703c.041.04.052.06.059.083a.118.118 0 0 1 0 .07c-.007.022-.018.042-.059.083l-57.69 57.69c-.041.041-.06.052-.084.059a.118.118 0 0 1-.069 0c-.023-.007-.042-.018-.083-.059L512 569.926 224.297 857.629c-.04.041-.06.052-.083.059a.118.118 0 0 1-.07 0c-.022-.007-.042-.018-.083-.059l-57.69-57.69c-.041-.041-.052-.06-.059-.084a.118.118 0 0 1 0-.069c.007-.023.018-.042.059-.083L454.073 512 166.371 224.297c-.041-.04-.052-.06-.059-.083a.118.118 0 0 1 0-.07c.007-.022.018-.042.059-.083l57.69-57.69c.041-.041.06-.052.084-.059a.118.118 0 0 1 .069 0c.023.007.042.018.083.059L512 454.073l287.703-287.702c.04-.041.06-.052.083-.059a.118.118 0 0 1 .07 0Z"
-                />
-              </svg>
-            </button>
-          </div>
-        </div>
-        <div
-          class="modal-body"
-        >
-          <form
-            class="mb-2"
-          >
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  ISBN
-                </label>
-              </div>
-              <div
-                class="d-flex flex-column col"
-              >
-                <div
-                  class="d-flex"
-                >
-                  <input
-                    class="form-control"
-                    name="isbn"
-                    style="border-radius: 5px 0px 0px 5px;"
-                  />
-                  <button
-                    class="mr-2 pt-0 btn btn-primary"
-                    style="border-radius: 0px 5px 5px 0px;"
-                    type="button"
-                  >
-                    <svg
-                      fill="currentColor"
-                      height="20"
-                      stroke="currentColor"
-                      stroke-width="0"
-                      version="1.1"
-                      viewBox="0 0 16 16"
-                      width="20"
-                      xmlns="http://www.w3.org/2000/svg"
-                    >
-                      <path
-                        d="M4.75 9.5c0 1.795 1.455 3.25 3.25 3.25s3.25-1.455 3.25-3.25-1.455-3.25-3.25-3.25-3.25 1.455-3.25 3.25zM15 4h-3.5c-0.25-1-0.5-2-1.5-2h-4c-1 0-1.25 1-1.5 2h-3.5c-0.55 0-1 0.45-1 1v9c0 0.55 0.45 1 1 1h14c0.55 0 1-0.45 1-1v-9c0-0.55-0.45-1-1-1zM8 13.938c-2.451 0-4.438-1.987-4.438-4.438s1.987-4.438 4.438-4.438c2.451 0 4.438 1.987 4.438 4.438s-1.987 4.438-4.438 4.438zM15 7h-2v-1h2v1z"
-                      />
-                    </svg>
-                  </button>
-                </div>
-                <div
-                  class="invalid-feedback"
-                  style="display: none;"
-                >
-                  ISBN is required
-                </div>
-              </div>
-            </div>
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  Title
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <input
-                  class="form-control"
-                  name="title"
-                />
-                <div
-                  class="invalid-feedback"
-                >
-                  Title is required
-                </div>
-              </div>
-            </div>
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  Year published
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <input
-                  class="form-control"
-                  name="published"
-                />
-                <div
-                  class="invalid-feedback"
-                >
-                  Year published is required
-                </div>
-              </div>
-            </div>
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  Shelf
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <div
-                  class="invalid-feedback"
-                >
-                  Target shelf is required
-                </div>
-              </div>
-            </div>
-            <div
-              class="d-flex mx-auto mb-auto mt-2 w-100"
-            >
-              <button
-                class="btn btn-primary"
-                style="border-radius: 5px; margin-left: auto; margin-right: 10px;"
-                type="button"
-              >
-                Add Book
-              </button>
-            </div>
-          </form>
-        </div>
-      </div>
-    </div>
-  </div>
-</body>
-`;
-
-exports[`BookModal sets book as default value 1`] = `
-<body
-  class="modal-open"
-  data-rr-ui-modal-open=""
-  style="padding-right: 2048px;"
->
-  <div />
-  <div
-    class="fade modal-backdrop show"
-  />
-  <div
-    aria-modal="true"
-    class="fade modal show"
-    role="dialog"
-    style="display: block; padding-right: 0px;"
-    tabindex="-1"
-  >
-    <div
-      class="modal-dialog modal-dialog-centered"
-    >
-      <div
-        class="modal-content"
-      >
-        <div
-          class="modal-header"
-        >
-          <div
-            class="w-100 d-flex modal-title h4"
-          >
-            <svg
-              class="ml-0 mr-auto"
-              fill="currentColor"
-              height="50"
-              stroke="currentColor"
-              stroke-width="0"
-              version="1.1"
-              viewBox="0 0 16 16"
-              width="50"
-              xmlns="http://www.w3.org/2000/svg"
-            >
-              <path
-                d="M14 2v13h-10.5c-0.829 0-1.5-0.672-1.5-1.5s0.671-1.5 1.5-1.5h9.5v-12h-10c-1.1 0-2 0.9-2 2v12c0 1.1 0.9 2 2 2h12v-14h-1z"
-              />
-              <path
-                d="M3.501 13v0c-0 0-0.001 0-0.001 0-0.276 0-0.5 0.224-0.5 0.5s0.224 0.5 0.5 0.5c0 0 0.001-0 0.001-0v0h9.498v-1h-9.498z"
-              />
-            </svg>
-            <h2
-              class="m-auto p-2"
-              style="text-align: center;"
-            >
-              Edit Book
-            </h2>
-            <button
-              class="ml-auto mr-0 btn btn-primary"
-              type="button"
-            >
-              <svg
-                fill="currentColor"
-                fill-rule="evenodd"
-                height="1em"
-                stroke="currentColor"
-                stroke-width="0"
-                viewBox="0 0 1024 1024"
-                width="1em"
-                xmlns="http://www.w3.org/2000/svg"
-              >
-                <path
-                  d="M799.855 166.312c.023.007.043.018.084.059l57.69 57.69c.041.041.052.06.059.084a.118.118 0 0 1 0 .069c-.007.023-.018.042-.059.083L569.926 512l287.703 287.703c.041.04.052.06.059.083a.118.118 0 0 1 0 .07c-.007.022-.018.042-.059.083l-57.69 57.69c-.041.041-.06.052-.084.059a.118.118 0 0 1-.069 0c-.023-.007-.042-.018-.083-.059L512 569.926 224.297 857.629c-.04.041-.06.052-.083.059a.118.118 0 0 1-.07 0c-.022-.007-.042-.018-.083-.059l-57.69-57.69c-.041-.041-.052-.06-.059-.084a.118.118 0 0 1 0-.069c.007-.023.018-.042.059-.083L454.073 512 166.371 224.297c-.041-.04-.052-.06-.059-.083a.118.118 0 0 1 0-.07c.007-.022.018-.042.059-.083l57.69-57.69c.041-.041.06-.052.084-.059a.118.118 0 0 1 .069 0c.023.007.042.018.083.059L512 454.073l287.703-287.702c.04-.041.06-.052.083-.059a.118.118 0 0 1 .07 0Z"
-                />
-              </svg>
-            </button>
-          </div>
-        </div>
-        <div
-          class="modal-body"
-        >
-          <form
-            class="mb-2"
-          >
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  ISBN
-                </label>
-              </div>
-              <div
-                class="d-flex flex-column col"
-              >
-                <div
-                  class="d-flex"
-                >
-                  <input
-                    class="form-control"
-                    name="isbn"
-                    style="border-radius: 5px 0px 0px 5px;"
-                  />
-                  <button
-                    class="mr-2 pt-0 btn btn-primary"
-                    style="border-radius: 0px 5px 5px 0px;"
-                    type="button"
-                  >
-                    <svg
-                      fill="currentColor"
-                      height="20"
-                      stroke="currentColor"
-                      stroke-width="0"
-                      version="1.1"
-                      viewBox="0 0 16 16"
-                      width="20"
-                      xmlns="http://www.w3.org/2000/svg"
-                    >
-                      <path
-                        d="M4.75 9.5c0 1.795 1.455 3.25 3.25 3.25s3.25-1.455 3.25-3.25-1.455-3.25-3.25-3.25-3.25 1.455-3.25 3.25zM15 4h-3.5c-0.25-1-0.5-2-1.5-2h-4c-1 0-1.25 1-1.5 2h-3.5c-0.55 0-1 0.45-1 1v9c0 0.55 0.45 1 1 1h14c0.55 0 1-0.45 1-1v-9c0-0.55-0.45-1-1-1zM8 13.938c-2.451 0-4.438-1.987-4.438-4.438s1.987-4.438 4.438-4.438c2.451 0 4.438 1.987 4.438 4.438s-1.987 4.438-4.438 4.438zM15 7h-2v-1h2v1z"
-                      />
-                    </svg>
-                  </button>
-                </div>
-                <div
-                  class="invalid-feedback"
-                  style="display: none;"
-                >
-                  ISBN is required
-                </div>
-              </div>
-            </div>
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  Title
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <input
-                  class="form-control"
-                  name="title"
-                />
-                <div
-                  class="invalid-feedback"
-                />
-              </div>
-            </div>
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  Year published
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <input
-                  class="form-control"
-                  name="published"
-                />
-                <div
-                  class="invalid-feedback"
-                />
-              </div>
-            </div>
-            <div
-              class="mb-2 row"
-            >
-              <div
-                class="col-sm-2"
-              >
-                <label
-                  class="form-label"
-                >
-                  Shelf
-                </label>
-              </div>
-              <div
-                class="col"
-              >
-                <div
-                  class="invalid-feedback"
-                />
-              </div>
-            </div>
-            <div
-              class="d-flex mx-auto mb-auto mt-2 w-100"
-            >
-              <button
-                class="btn btn-primary"
-                style="border-radius: 5px; margin-left: auto; margin-right: 10px;"
-                type="button"
-              >
-                Submit
-              </button>
-            </div>
-          </form>
-        </div>
-      </div>
-    </div>
-  </div>
-</body>
-`;
diff --git a/frontend/src/shared/utils/__tests__/getMedianOfCodeErrors.test.ts b/frontend/src/shared/utils/__tests__/getMedianOfCodeErrors.test.ts
deleted file mode 100644
index 8411e00..0000000
--- a/frontend/src/shared/utils/__tests__/getMedianOfCodeErrors.test.ts
+++ /dev/null
@@ -1,69 +0,0 @@
-import { QuaggaJSResultObject } from "@ericblade/quagga2";
-import { getMedianOfCodeErrors } from "../getMedianOfCodeErrors";
-
-export const createMockQuaggaResult = (
-  decodedCodes: Array<{
-    error?: number;
-    code: number;
-    start: number;
-    end: number;
-  }> = []
-): QuaggaJSResultObject => ({
-  codeResult: {
-    code: "123456",
-    start: 0,
-    end: 10,
-    codeset: 1,
-    startInfo: {
-      error: 0,
-      code: 1,
-      start: 0,
-      end: 5,
-    },
-    decodedCodes,
-    endInfo: {
-      error: 0,
-      code: 1,
-      start: 5,
-      end: 10,
-    },
-    direction: 1,
-    format: "QR",
-  },
-  barcodes: [],
-  line: [{ x: 0, y: 0 }],
-  angle: 0,
-  pattern: [],
-  box: [],
-  boxes: [],
-});
-
-describe("getMedianOfCodeErrors", () => {
-  it("should return the median of code errors when there are valid errors", () => {
-    const result = createMockQuaggaResult([
-      { error: 1, code: 1, start: 0, end: 5 },
-      { error: 3, code: 1, start: 5, end: 10 },
-      { error: 2, code: 1, start: 0, end: 10 },
-    ]);
-
-    const median = getMedianOfCodeErrors(result);
-    expect(median).toBe(2); // The median of [1, 3, 2] is 2
-  });
-
-  it("should return undefined when there are no code errors", () => {
-    const result = createMockQuaggaResult([
-      { code: 1, start: 0, end: 5 }, // No error property
-      { code: 1, start: 5, end: 10 },
-    ]);
-
-    const median = getMedianOfCodeErrors(result);
-    expect(median).toBeUndefined();
-  });
-
-  it("should handle an empty decodedCodes array", () => {
-    const result = createMockQuaggaResult([]);
-
-    const median = getMedianOfCodeErrors(result);
-    expect(median).toBeUndefined();
-  });
-});
diff --git a/frontend/src/shared/utils/__tests__/useAuthentication.test.tsx b/frontend/src/shared/utils/__tests__/useAuthentication.test.tsx
deleted file mode 100644
index 0f85e3e..0000000
--- a/frontend/src/shared/utils/__tests__/useAuthentication.test.tsx
+++ /dev/null
@@ -1,66 +0,0 @@
-import React from "react";
-import { render, waitFor, cleanup } from "@testing-library/react";
-import { AuthContext } from "../../../App";
-import { useAuth } from "../useAuthentication";
-
-const MockedComponent: React.FC = () => {
-  const { authenticated } = useAuth();
-  return <div>{authenticated}</div>;
-};
-
-let authenticated = false;
-const setAuthenticated = (args: boolean) => (authenticated = args);
-
-describe("useAuth", () => {
-  beforeEach(() => {
-    jest.clearAllMocks();
-    cleanup();
-  });
-
-  afterEach(() => {
-    jest.clearAllMocks();
-    cleanup();
-  });
-
-  it("should set authenticated to true when fetch returns ok", async () => {
-    global.fetch = jest.fn(() => Promise.resolve({ ok: true })) as jest.Mock;
-
-    render(
-      <AuthContext.Provider value={{ authenticated, setAuthenticated }}>
-        <MockedComponent />
-      </AuthContext.Provider>
-    );
-
-    await waitFor(() => expect(fetch).toHaveBeenCalledTimes(1));
-
-    expect(authenticated).toBe(true);
-  });
-
-  it("should set authenticated to false when fetch returns not ok", async () => {
-    global.fetch = jest.fn(() => Promise.resolve({ ok: false })) as jest.Mock;
-
-    render(
-      <AuthContext.Provider value={{ authenticated, setAuthenticated }}>
-        <MockedComponent />
-      </AuthContext.Provider>
-    );
-
-    await waitFor(() => expect(fetch).toHaveBeenCalledTimes(1));
-
-    expect(authenticated).toBe(false);
-  });
-
-  it("should call fetch once", async () => {
-    global.fetch = jest.fn(() => Promise.resolve({ ok: false })) as jest.Mock;
-
-    render(
-      <AuthContext.Provider value={{ authenticated, setAuthenticated }}>
-        <MockedComponent />
-      </AuthContext.Provider>
-    );
-
-    await waitFor(() => {
-      expect(fetch).toHaveBeenCalledTimes(1);
-    });
-  });
-});
diff --git a/frontend/src/shared/utils/drawQuaggaProcessing.ts b/frontend/src/shared/utils/drawQuaggaProcessing.ts
deleted file mode 100644
index 6185a7b..0000000
--- a/frontend/src/shared/utils/drawQuaggaProcessing.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import Quagga, { QuaggaJSResultObject } from "@ericblade/quagga2";
-
-export const drawQuaggaProcessing = (result: QuaggaJSResultObject) => {
-  const drawingCtx = Quagga.canvas.ctx.overlay;
-  const drawingCanvas = Quagga.canvas.dom.overlay;
-  drawingCtx.font = "24px Arial";
-  drawingCtx.fillStyle = "green";
-  const width = drawingCanvas.getAttribute("width");
-  const height = drawingCanvas.getAttribute("height");
-
-  if (result) {
-    if (result.boxes && width && height) {
-      drawingCtx.clearRect(0, 0, parseInt(width), parseInt(height));
-      result.boxes
-        .filter((box) => box !== result.box)
-        .forEach((box) => {
-          Quagga.ImageDebug.drawPath(box, { x: 0, y: 1 }, drawingCtx, {
-            color: "purple",
-            lineWidth: 2,
-          });
-        });
-    }
-    if (result.box) {
-      Quagga.ImageDebug.drawPath(result.box, { x: 0, y: 1 }, drawingCtx, {
-        color: "blue",
-        lineWidth: 2,
-      });
-    }
-    if (result.codeResult && result.codeResult.code) {
-      drawingCtx.font = "24px Arial";
-      drawingCtx.fillText(result.codeResult.code, 10, 20);
-    }
-  }
-};
diff --git a/frontend/src/shared/utils/getMedianOfCodeErrors.ts b/frontend/src/shared/utils/getMedianOfCodeErrors.ts
deleted file mode 100644
index e43e0ca..0000000
--- a/frontend/src/shared/utils/getMedianOfCodeErrors.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { QuaggaJSResultObject } from "@ericblade/quagga2";
-
-export const getMedianOfCodeErrors = (result: QuaggaJSResultObject) => {
-  const errors = result.codeResult.decodedCodes.flatMap((x) => x.error);
-  const medianOfErrors = getMedian(errors);
-  return medianOfErrors;
-};
-
-export const getMedian = (arr: (number | undefined)[]) => {
-  const newArr = [...arr].filter((x) => typeof x !== "undefined");
-  if (!newArr.length) {
-    return;
-  }
-  newArr.sort((a, b) => a! - b!);
-  const half = Math.floor(newArr.length / 2);
-  if (newArr.length % 2 === 1) {
-    return newArr[half];
-  }
-  return (newArr[half - 1]! + newArr[half]!) / 2;
-};
diff --git a/frontend/src/shared/utils/useAuthentication.ts b/frontend/src/shared/utils/useAuthentication.ts
index 3d6e203..b3d5c36 100644
--- a/frontend/src/shared/utils/useAuthentication.ts
+++ b/frontend/src/shared/utils/useAuthentication.ts
@@ -1,10 +1,11 @@
-import { useCallback, useContext, useEffect } from "react";
+import { useCallback, useContext } from "react";
 import { AuthContext } from "../../App";
+import { useQuery } from "@tanstack/react-query";
 
 type UseAuthHook = { authenticated: boolean };
 
 export const useAuth = (): UseAuthHook => {
-  const { authenticated, setAuthenticated } = useContext(AuthContext);
+  const auth = useContext(AuthContext);
 
   const authenticationCheck = useCallback(
     async () =>
@@ -15,14 +16,17 @@ export const useAuth = (): UseAuthHook => {
           "Content-Type": "application/json",
         },
       }).then((res) => {
-        setAuthenticated?.(res.ok);
+        auth.setAuthenticated?.(res.ok);
+        //react-query can't handle undefined without throwing a warning ...
+        return null;
       }),
-    [setAuthenticated]
+    [auth]
   );
 
-  useEffect(() => {
-    authenticationCheck();
-  }, [authenticationCheck]);
+  useQuery({
+    queryFn: authenticationCheck,
+    queryKey: ["auth"],
+  });
 
-  return { authenticated };
+  return auth;
 };
diff --git a/frontend/src/shared/utils/useScanner.ts b/frontend/src/shared/utils/useScanner.ts
index 44aa7ee..70666b2 100644
--- a/frontend/src/shared/utils/useScanner.ts
+++ b/frontend/src/shared/utils/useScanner.ts
@@ -3,8 +3,6 @@ import Quagga, {
   QuaggaJSResultObject,
 } from "@ericblade/quagga2";
 import { useState, useCallback, useEffect } from "react";
-import { getMedianOfCodeErrors } from "./getMedianOfCodeErrors";
-import { drawQuaggaProcessing } from "./drawQuaggaProcessing";
 
 const constraints = {
   width: 640,
@@ -31,6 +29,28 @@ export const useScanner = ({
 
   const [scannerRef, setScannerRef] = useState<HTMLDivElement | null>(null);
 
+  const getMedian = useCallback((arr: (number | undefined)[]) => {
+    const newArr = [...arr].filter((x) => typeof x !== "undefined");
+    if (!newArr.length) {
+      return;
+    }
+    newArr.sort((a, b) => a! - b!);
+    const half = Math.floor(newArr.length / 2);
+    if (newArr.length % 2 === 1) {
+      return newArr[half];
+    }
+    return (newArr[half - 1]! + newArr[half]!) / 2;
+  }, []);
+
+  const getMedianOfCodeErrors = useCallback(
+    (result: QuaggaJSResultObject) => {
+      const errors = result.codeResult.decodedCodes.flatMap((x) => x.error);
+      const medianOfErrors = getMedian(errors);
+      return medianOfErrors;
+    },
+    [getMedian]
+  );
+
   const errorCheck = useCallback(
     (result: QuaggaJSResultObject) => {
       if (!onDetected) {
@@ -46,9 +66,42 @@ export const useScanner = ({
         onDetected(result.codeResult.code);
       }
     },
-    [onDetected]
+    [getMedianOfCodeErrors, onDetected]
   );
 
+  const handleProcessed = (result: QuaggaJSResultObject) => {
+    const drawingCtx = Quagga.canvas.ctx.overlay;
+    const drawingCanvas = Quagga.canvas.dom.overlay;
+    drawingCtx.font = "24px Arial";
+    drawingCtx.fillStyle = "green";
+    const width = drawingCanvas.getAttribute("width");
+    const height = drawingCanvas.getAttribute("height");
+
+    if (result) {
+      if (result.boxes && width && height) {
+        drawingCtx.clearRect(0, 0, parseInt(width), parseInt(height));
+        result.boxes
+          .filter((box) => box !== result.box)
+          .forEach((box) => {
+            Quagga.ImageDebug.drawPath(box, { x: 0, y: 1 }, drawingCtx, {
+              color: "purple",
+              lineWidth: 2,
+            });
+          });
+      }
+      if (result.box) {
+        Quagga.ImageDebug.drawPath(result.box, { x: 0, y: 1 }, drawingCtx, {
+          color: "blue",
+          lineWidth: 2,
+        });
+      }
+      if (result.codeResult && result.codeResult.code) {
+        drawingCtx.font = "24px Arial";
+        drawingCtx.fillText(result.codeResult.code, 10, 20);
+      }
+    }
+  };
+
   const getCameraId = useCallback(async () => {
     const stream = await navigator.mediaDevices.getUserMedia({
       video: { facingMode: "environment" },
@@ -97,7 +150,7 @@ export const useScanner = ({
           locate: true,
         },
         async (err) => {
-          Quagga.onProcessed(drawQuaggaProcessing);
+          Quagga.onProcessed(handleProcessed);
 
           if (err) {
             return console.error("Error starting Quagga:", err);
@@ -117,7 +170,7 @@ export const useScanner = ({
     await Quagga.CameraAccess.release();
     await Quagga.stop();
     Quagga.offDetected(errorCheck);
-    Quagga.offProcessed(drawQuaggaProcessing);
+    Quagga.offProcessed(handleProcessed);
   }, [errorCheck]);
 
   useEffect(() => {
diff --git a/frontend/src/types/Book.ts b/frontend/src/types/Book.ts
index dc0e488..393a1df 100644
--- a/frontend/src/types/Book.ts
+++ b/frontend/src/types/Book.ts
@@ -1,3 +1,12 @@
+export const bookShelfs = {
+  available: "AVAILABLE",
+  fnord1: "FNORD1",
+  fnord2: "FNORD2",
+  sharing: "SHARING",
+} as const;
+
+export type Shelf = (typeof bookShelfs)[keyof typeof bookShelfs];
+
 export type Book = {
   id: number;
   uuid: string;
@@ -7,5 +16,5 @@ export type Book = {
   lastCheckoutDate: number | null;
   checkoutBy: string | null;
   contact: string | null;
-  shelf: string | null;
+  shelf: Shelf | null;
 };
diff --git a/middleware/index.ts b/middleware/index.ts
index e87c4a7..2b3ab01 100644
--- a/middleware/index.ts
+++ b/middleware/index.ts
@@ -12,7 +12,6 @@ import {
   deleteBook,
   editBook,
   returnBook,
-  listShelves,
 } from "./queries";
 import { v4 as uuidv4 } from "uuid";
 import path from "path";
@@ -371,24 +370,6 @@ app.get(
   }
 );
 
-app.get(
-  "/api/shelves/list",
-  async (
-    req: Request<undefined, undefined, null>,
-    res: Response<string[] | string>
-  ) => {
-    try {
-      const conn = await pool.getConnection();
-      const books = await conn.query<Book[]>(listShelves);
-      const shelves = books.map((e) => (!e.shelf ? "AVAILABLE" : e.shelf));
-      await conn.end();
-      res.status(200).send(shelves);
-    } catch (error) {
-      res.status(500).send("Internal Server Error: " + error);
-    }
-  }
-);
-
 app.post(
   "/api/books/return",
   async (
diff --git a/middleware/queries/index.ts b/middleware/queries/index.ts
index c52e1a2..94863aa 100644
--- a/middleware/queries/index.ts
+++ b/middleware/queries/index.ts
@@ -6,4 +6,3 @@ export { findBook } from "./findBook";
 export { createBook } from "./createBook";
 export { deleteBook } from "./deleteBook";
 export { editBook } from "./editBook";
-export { listShelves } from "./listShelves";
diff --git a/middleware/queries/listShelves.ts b/middleware/queries/listShelves.ts
deleted file mode 100644
index f4adf50..0000000
--- a/middleware/queries/listShelves.ts
+++ /dev/null
@@ -1 +0,0 @@
-export const listShelves = `SELECT DISTINCT shelf FROM bookData;`;