diff --git a/komga-webui/src/components/dialogs/ReadListAddToDialog.vue b/komga-webui/src/components/dialogs/ReadListAddToDialog.vue
index 61b47a5fa..70bedf24b 100644
--- a/komga-webui/src/components/dialogs/ReadListAddToDialog.vue
+++ b/komga-webui/src/components/dialogs/ReadListAddToDialog.vue
@@ -150,7 +150,7 @@ export default Vue.extend({
       } as ReadListCreationDto
 
       try {
-        const created = await this.$komgaReadLists.postReadList(toCreate)
+        await this.$komgaReadLists.postReadList(toCreate)
         this.dialogClose()
       } catch (e) {
         this.$eventHub.$emit(ERROR, {message: e.message} as ErrorEvent)
diff --git a/komga-webui/src/components/dialogs/ReadListEditDialog.vue b/komga-webui/src/components/dialogs/ReadListEditDialog.vue
index 4e860e07a..d7113b364 100644
--- a/komga-webui/src/components/dialogs/ReadListEditDialog.vue
+++ b/komga-webui/src/components/dialogs/ReadListEditDialog.vue
@@ -46,6 +46,17 @@
                   </v-col>
                 </v-row>
 
+                <v-row>
+                  <v-col>
+                    <div class="text-body-2">{{ $t('dialog.edit_readlist.label_ordering') }}</div>
+                    <v-checkbox
+                      v-model="form.ordered"
+                      :label="$t('dialog.edit_readlist.field_manual_ordering')"
+                      hide-details
+                    />
+                  </v-col>
+                </v-row>
+
               </v-container>
             </v-card>
           </v-tab-item>
@@ -118,6 +129,7 @@ export default Vue.extend({
       form: {
         name: '',
         summary: '',
+        ordered: true,
       },
       poster: {
         selectedThumbnail: '',
@@ -170,6 +182,7 @@ export default Vue.extend({
       this.tab = 0
       this.form.name = readList.name
       this.form.summary = readList.summary
+      this.form.ordered = readList.ordered
 
       this.poster.selectedThumbnail = ''
       this.poster.deleteQueue = []
@@ -216,6 +229,7 @@ export default Vue.extend({
         const update = {
           name: this.form.name,
           summary: this.form.summary,
+          ordered: this.form.ordered,
         } as ReadListUpdateDto
 
         await this.$komgaReadLists.patchReadList(this.readList.id, update)
diff --git a/komga-webui/src/locales/en.json b/komga-webui/src/locales/en.json
index 31f0c4f06..473d69d68 100644
--- a/komga-webui/src/locales/en.json
+++ b/komga-webui/src/locales/en.json
@@ -174,7 +174,8 @@
   },
   "browse_readlist": {
     "edit_elements": "Edit elements",
-    "edit_readlist": "Edit read list"
+    "edit_readlist": "Edit read list",
+    "manual_ordering": "manual ordering"
   },
   "browse_series": {
     "earliest_year_from_release_dates": "This is the earliest year from the release dates from all books in the series",
@@ -434,7 +435,9 @@
       "button_confirm": "Save changes",
       "dialog_title": "Edit read list",
       "field_name": "Name",
+      "field_manual_ordering": "Manual ordering",
       "field_summary": "Summary",
+      "label_ordering": "By default, books in a read list are ordered manually. You can disable manual ordering to sort books by release date.",
       "tab_general": "General",
       "tab_poster": "Poster"
     },
diff --git a/komga-webui/src/types/komga-readlists.ts b/komga-webui/src/types/komga-readlists.ts
index 847d35cea..303ec5e71 100644
--- a/komga-webui/src/types/komga-readlists.ts
+++ b/komga-webui/src/types/komga-readlists.ts
@@ -2,6 +2,7 @@ interface ReadListDto {
   id: string,
   name: string,
   summary: string,
+  ordered: boolean,
   filtered: boolean,
   bookIds: string[],
   createdDate: string,
@@ -11,12 +12,14 @@ interface ReadListDto {
 interface ReadListCreationDto {
   name: string,
   summary?: string,
+  ordered?: boolean,
   bookIds: string[]
 }
 
 interface ReadListUpdateDto {
   name?: string,
   summary?: string,
+  ordered?: boolean,
   bookIds?: string[]
 }
 
diff --git a/komga-webui/src/views/BrowseReadList.vue b/komga-webui/src/views/BrowseReadList.vue
index b18c234a3..6134b2ac4 100644
--- a/komga-webui/src/views/BrowseReadList.vue
+++ b/komga-webui/src/views/BrowseReadList.vue
@@ -11,6 +11,9 @@
         <v-chip label class="mx-4">
           <span style="font-size: 1.1rem">{{ readList.bookIds.length }}</span>
         </v-chip>
+        <span v-if="readList.ordered"
+              class="font-italic text-overline"
+        >({{ $t('browse_readlist.manual_ordering') }})</span>
       </v-toolbar-title>
 
       <v-spacer/>
@@ -131,10 +134,10 @@
 
         <item-browser
           :items.sync="books"
-          :item-context="[ItemContext.SHOW_SERIES]"
+          :item-context="itemContext"
           :selected.sync="selectedBooks"
           :edit-function="isAdmin ? editSingleBook : undefined"
-          :draggable="editElements"
+          :draggable="editElements && readList.ordered"
           :deletable="editElements"
         />
 
@@ -275,6 +278,10 @@ export default Vue.extend({
     next()
   },
   computed: {
+    itemContext(): ItemContext[] {
+      if(this.readList?.ordered === false) return [ItemContext.SHOW_SERIES, ItemContext.RELEASE_DATE]
+      return [ItemContext.SHOW_SERIES]
+    },
     paginationVisible(): number {
       switch (this.$vuetify.breakpoint.name) {
         case 'xs':
diff --git a/komga/src/flyway/resources/db/migration/sqlite/V20230221170726__readlist_ordered.sql b/komga/src/flyway/resources/db/migration/sqlite/V20230221170726__readlist_ordered.sql
new file mode 100644
index 000000000..1922ac3e4
--- /dev/null
+++ b/komga/src/flyway/resources/db/migration/sqlite/V20230221170726__readlist_ordered.sql
@@ -0,0 +1,2 @@
+alter table READLIST
+    add column ORDERED boolean NOT NULL DEFAULT 1;
diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/model/ReadList.kt b/komga/src/main/kotlin/org/gotson/komga/domain/model/ReadList.kt
index 484f7934f..a3cbfb3b6 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/model/ReadList.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/model/ReadList.kt
@@ -8,6 +8,10 @@ import java.util.SortedMap
 data class ReadList(
   val name: String,
   val summary: String = "",
+  /**
+   * Indicates whether the read list is ordered manually
+   */
+  val ordered: Boolean = true,
 
   val bookIds: SortedMap<Int, String> = sortedMapOf(),
 
diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/model/SeriesCollection.kt b/komga/src/main/kotlin/org/gotson/komga/domain/model/SeriesCollection.kt
index a17eb92c5..7313321fe 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/model/SeriesCollection.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/model/SeriesCollection.kt
@@ -6,6 +6,9 @@ import java.time.LocalDateTime
 
 data class SeriesCollection(
   val name: String,
+  /**
+   * Indicates whether the collection is ordered manually
+   */
   val ordered: Boolean = false,
 
   val seriesIds: List<String> = emptyList(),
diff --git a/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt b/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt
index 6cdd4e0d3..521a0e70f 100644
--- a/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt
@@ -2,6 +2,7 @@ package org.gotson.komga.infrastructure.jooq
 
 import org.gotson.komga.domain.model.BookSearchWithReadProgress
 import org.gotson.komga.domain.model.ContentRestrictions
+import org.gotson.komga.domain.model.ReadList
 import org.gotson.komga.domain.model.ReadStatus
 import org.gotson.komga.infrastructure.datasource.SqliteUdfDataSource
 import org.gotson.komga.infrastructure.search.LuceneEntity
@@ -185,20 +186,20 @@ class BookDtoDao(
     findSiblingSeries(bookId, userId, next = true)
 
   override fun findPreviousInReadListOrNull(
-    readListId: String,
+    readList: ReadList,
     bookId: String,
     userId: String,
     filterOnLibraryIds: Collection<String>?,
   ): BookDto? =
-    findSiblingReadList(readListId, bookId, userId, filterOnLibraryIds, next = false)
+    findSiblingReadList(readList, bookId, userId, filterOnLibraryIds, next = false)
 
   override fun findNextInReadListOrNull(
-    readListId: String,
+    readList: ReadList,
     bookId: String,
     userId: String,
     filterOnLibraryIds: Collection<String>?,
   ): BookDto? =
-    findSiblingReadList(readListId, bookId, userId, filterOnLibraryIds, next = true)
+    findSiblingReadList(readList, bookId, userId, filterOnLibraryIds, next = true)
 
   override fun findAllOnDeck(userId: String, filterOnLibraryIds: Collection<String>?, pageable: Pageable, restrictions: ContentRestrictions): Page<BookDto> {
     val seriesIds = dsl.select(s.ID)
@@ -283,28 +284,52 @@ class BookDtoDao(
   }
 
   private fun findSiblingReadList(
-    readListId: String,
+    readList: ReadList,
     bookId: String,
     userId: String,
     filterOnLibraryIds: Collection<String>?,
     next: Boolean,
   ): BookDto? {
-    val numberSort = dsl.select(rlb.NUMBER)
-      .from(b)
-      .leftJoin(rlb).on(b.ID.eq(rlb.BOOK_ID))
-      .where(b.ID.eq(bookId))
-      .and(rlb.READLIST_ID.eq(readListId))
-      .apply { filterOnLibraryIds?.let { and(b.LIBRARY_ID.`in`(it)) } }
-      .fetchOne(0, Int::class.java)
+    if (readList.ordered) {
+      val numberSort = dsl.select(rlb.NUMBER)
+        .from(b)
+        .leftJoin(rlb).on(b.ID.eq(rlb.BOOK_ID))
+        .where(b.ID.eq(bookId))
+        .and(rlb.READLIST_ID.eq(readList.id))
+        .apply { filterOnLibraryIds?.let { and(b.LIBRARY_ID.`in`(it)) } }
+        .fetchOne(rlb.NUMBER)
 
-    return selectBase(userId, true)
-      .where(rlb.READLIST_ID.eq(readListId))
-      .apply { filterOnLibraryIds?.let { and(b.LIBRARY_ID.`in`(it)) } }
-      .orderBy(rlb.NUMBER.let { if (next) it.asc() else it.desc() })
-      .seek(numberSort)
-      .limit(1)
-      .fetchAndMap()
-      .firstOrNull()
+      return selectBase(userId, true)
+        .where(rlb.READLIST_ID.eq(readList.id))
+        .apply { filterOnLibraryIds?.let { and(b.LIBRARY_ID.`in`(it)) } }
+        .orderBy(rlb.NUMBER.let { if (next) it.asc() else it.desc() })
+        .seek(numberSort)
+        .limit(1)
+        .fetchAndMap()
+        .firstOrNull()
+    } else {
+      // it is too complex to perform a seek by release date as it could be null and could also have multiple occurrences of the same value
+      // instead we pull the whole list of ids, and perform the seek on the list
+      val bookIds = dsl.select(b.ID)
+        .from(b)
+        .leftJoin(rlb).on(b.ID.eq(rlb.BOOK_ID))
+        .leftJoin(d).on(b.ID.eq(d.BOOK_ID))
+        .where(rlb.READLIST_ID.eq(readList.id))
+        .apply { filterOnLibraryIds?.let { and(b.LIBRARY_ID.`in`(it)) } }
+        .orderBy(d.RELEASE_DATE)
+        .fetch(b.ID)
+
+      val bookIndex = bookIds.indexOfFirst { it == bookId }
+      if (bookIndex == -1) return null
+      val siblingId = bookIds.getOrNull(bookIndex + if (next) 1 else -1) ?: return null
+
+      return selectBase(userId)
+        .where(b.ID.eq(siblingId))
+        .apply { filterOnLibraryIds?.let { and(b.LIBRARY_ID.`in`(it)) } }
+        .limit(1)
+        .fetchAndMap()
+        .firstOrNull()
+    }
   }
 
   private fun selectBase(userId: String, selectReadListNumber: Boolean = false) =
diff --git a/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/ReadListDao.kt b/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/ReadListDao.kt
index 00d32183e..70b9022ca 100644
--- a/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/ReadListDao.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/ReadListDao.kt
@@ -157,6 +157,7 @@ class ReadListDao(
       .set(rl.ID, readList.id)
       .set(rl.NAME, readList.name)
       .set(rl.SUMMARY, readList.summary)
+      .set(rl.ORDERED, readList.ordered)
       .set(rl.BOOK_COUNT, readList.bookIds.size)
       .execute()
 
@@ -178,6 +179,7 @@ class ReadListDao(
     dsl.update(rl)
       .set(rl.NAME, readList.name)
       .set(rl.SUMMARY, readList.summary)
+      .set(rl.ORDERED, readList.ordered)
       .set(rl.BOOK_COUNT, readList.bookIds.size)
       .set(rl.LAST_MODIFIED_DATE, LocalDateTime.now(ZoneId.of("Z")))
       .where(rl.ID.eq(readList.id))
@@ -233,6 +235,7 @@ class ReadListDao(
     ReadList(
       name = name,
       summary = summary,
+      ordered = ordered,
       bookIds = bookIds,
       id = id,
       createdDate = createdDate.toCurrentTimeZone(),
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/opds/OpdsController.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/opds/OpdsController.kt
index b7e4eb6c8..fe9e02e52 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/opds/OpdsController.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/opds/OpdsController.kt
@@ -621,7 +621,10 @@ class OpdsController(
     @Parameter(hidden = true) page: Pageable,
   ): OpdsFeed =
     readListRepository.findByIdOrNull(id, principal.user.getAuthorizedLibraryIds(null))?.let { readList ->
-      val pageable = PageRequest.of(page.pageNumber, page.pageSize, Sort.by(Sort.Order.asc("readList.number")))
+      val sort =
+        if (readList.ordered) Sort.by(Sort.Order.asc("readList.number"))
+        else Sort.by(Sort.Order.asc("metadata.releaseDate"))
+      val pageable = PageRequest.of(page.pageNumber, page.pageSize, sort)
 
       val bookSearch = BookSearchWithReadProgress(
         mediaStatus = setOf(Media.Status.READY),
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/persistence/BookDtoRepository.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/persistence/BookDtoRepository.kt
index 5e02dc4e5..99c3a4408 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/persistence/BookDtoRepository.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/persistence/BookDtoRepository.kt
@@ -2,6 +2,7 @@ package org.gotson.komga.interfaces.api.persistence
 
 import org.gotson.komga.domain.model.BookSearchWithReadProgress
 import org.gotson.komga.domain.model.ContentRestrictions
+import org.gotson.komga.domain.model.ReadList
 import org.gotson.komga.interfaces.api.rest.dto.BookDto
 import org.springframework.data.domain.Page
 import org.springframework.data.domain.Pageable
@@ -26,14 +27,14 @@ interface BookDtoRepository {
   fun findNextInSeriesOrNull(bookId: String, userId: String): BookDto?
 
   fun findPreviousInReadListOrNull(
-    readListId: String,
+    readList: ReadList,
     bookId: String,
     userId: String,
     filterOnLibraryIds: Collection<String>?,
   ): BookDto?
 
   fun findNextInReadListOrNull(
-    readListId: String,
+    readList: ReadList,
     bookId: String,
     userId: String,
     filterOnLibraryIds: Collection<String>?,
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/ReadListController.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/ReadListController.kt
index b096f7059..8b2f435a5 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/ReadListController.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/ReadListController.kt
@@ -232,6 +232,7 @@ class ReadListController(
         ReadList(
           name = readList.name,
           summary = readList.summary,
+          ordered = readList.ordered,
           bookIds = readList.bookIds.toIndexedMap(),
         ),
       ).toDto()
@@ -258,6 +259,7 @@ class ReadListController(
       val updated = existing.copy(
         name = readList.name ?: existing.name,
         summary = readList.summary ?: existing.summary,
+        ordered = readList.ordered ?: existing.ordered,
         bookIds = readList.bookIds?.toIndexedMap() ?: existing.bookIds,
       )
       try {
@@ -295,7 +297,9 @@ class ReadListController(
     @Parameter(hidden = true) page: Pageable,
   ): Page<BookDto> =
     readListRepository.findByIdOrNull(id, principal.user.getAuthorizedLibraryIds(null))?.let { readList ->
-      val sort = Sort.by(Sort.Order.asc("readList.number"))
+      val sort =
+        if (readList.ordered) Sort.by(Sort.Order.asc("readList.number"))
+        else Sort.by(Sort.Order.asc("metadata.releaseDate"))
 
       val pageRequest =
         if (unpaged) UnpagedSorted(sort)
@@ -332,7 +336,7 @@ class ReadListController(
   ): BookDto =
     readListRepository.findByIdOrNull(id, principal.user.getAuthorizedLibraryIds(null))?.let {
       bookDtoRepository.findPreviousInReadListOrNull(
-        id,
+        it,
         bookId,
         principal.user.id,
         principal.user.getAuthorizedLibraryIds(null),
@@ -348,7 +352,7 @@ class ReadListController(
   ): BookDto =
     readListRepository.findByIdOrNull(id, principal.user.getAuthorizedLibraryIds(null))?.let {
       bookDtoRepository.findNextInReadListOrNull(
-        id,
+        it,
         bookId,
         principal.user.id,
         principal.user.getAuthorizedLibraryIds(null),
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListCreationDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListCreationDto.kt
index 7318601e0..277380243 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListCreationDto.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListCreationDto.kt
@@ -7,6 +7,7 @@ import javax.validation.constraints.NotEmpty
 data class ReadListCreationDto(
   @get:NotBlank val name: String,
   val summary: String = "",
+  val ordered: Boolean = true,
   @get:NotEmpty @get:UniqueElements
   val bookIds: List<String>,
 )
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListDto.kt
index 68b0cbbf0..ee3bd40fa 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListDto.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListDto.kt
@@ -9,6 +9,7 @@ data class ReadListDto(
   val id: String,
   val name: String,
   val summary: String,
+  val ordered: Boolean,
 
   val bookIds: List<String>,
 
@@ -25,6 +26,7 @@ fun ReadList.toDto() =
     id = id,
     name = name,
     summary = summary,
+    ordered = ordered,
     bookIds = bookIds.values.toList(),
     createdDate = createdDate.toUTC(),
     lastModifiedDate = lastModifiedDate.toUTC(),
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListUpdateDto.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListUpdateDto.kt
index f169efcf3..517daa31a 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListUpdateDto.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/api/rest/dto/ReadListUpdateDto.kt
@@ -9,4 +9,5 @@ data class ReadListUpdateDto(
   val summary: String?,
   @get:NullOrNotEmpty @get:UniqueElements
   val bookIds: List<String>?,
+  val ordered: Boolean?,
 )
diff --git a/komga/src/test/kotlin/org/gotson/komga/interfaces/api/rest/ReadListControllerTest.kt b/komga/src/test/kotlin/org/gotson/komga/interfaces/api/rest/ReadListControllerTest.kt
index 032f6572d..706dc6f9d 100644
--- a/komga/src/test/kotlin/org/gotson/komga/interfaces/api/rest/ReadListControllerTest.kt
+++ b/komga/src/test/kotlin/org/gotson/komga/interfaces/api/rest/ReadListControllerTest.kt
@@ -6,6 +6,7 @@ import org.gotson.komga.domain.model.ReadList
 import org.gotson.komga.domain.model.makeBook
 import org.gotson.komga.domain.model.makeLibrary
 import org.gotson.komga.domain.model.makeSeries
+import org.gotson.komga.domain.persistence.BookMetadataRepository
 import org.gotson.komga.domain.persistence.LibraryRepository
 import org.gotson.komga.domain.persistence.ReadListRepository
 import org.gotson.komga.domain.persistence.SeriesMetadataRepository
@@ -14,9 +15,11 @@ import org.gotson.komga.domain.service.ReadListLifecycle
 import org.gotson.komga.domain.service.SeriesLifecycle
 import org.gotson.komga.language.toIndexedMap
 import org.hamcrest.Matchers
+import org.hamcrest.Matchers.contains
 import org.junit.jupiter.api.AfterAll
 import org.junit.jupiter.api.AfterEach
 import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Nested
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.extension.ExtendWith
@@ -33,6 +36,7 @@ import org.springframework.test.web.servlet.post
 import java.net.URLEncoder
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
+import java.time.LocalDate
 
 @ExtendWith(SpringExtension::class)
 @SpringBootTest
@@ -45,6 +49,7 @@ class ReadListControllerTest(
   @Autowired private val libraryRepository: LibraryRepository,
   @Autowired private val seriesLifecycle: SeriesLifecycle,
   @Autowired private val seriesMetadataRepository: SeriesMetadataRepository,
+  @Autowired private val bookMetadataRepository: BookMetadataRepository,
 ) {
 
   private val library1 = makeLibrary("Library1", id = "1")
@@ -1011,4 +1016,174 @@ class ReadListControllerTest(
         header { string("Content-Disposition", Matchers.containsString(URLEncoder.encode(name, StandardCharsets.UTF_8.name()))) }
       }
   }
+
+  @Nested
+  inner class Unordered {
+    private val library = makeLibrary("Library")
+    private val series = makeSeries("Series", library.id)
+    private lateinit var books: List<Book>
+    private lateinit var rlAllDiffDates: ReadList
+    private lateinit var rlAllNullDates: ReadList
+    private lateinit var rlAllBooks: ReadList
+
+    @BeforeAll
+    fun setup() {
+      libraryRepository.insert(library)
+
+      seriesLifecycle.createSeries(series)
+
+      books = (1..5).map { makeBook("Book_$it", libraryId = library.id, seriesId = series.id) }
+      seriesLifecycle.addBooks(series, books)
+
+      bookMetadataRepository.findById(books[0].id).let { bookMetadataRepository.update(it.copy(releaseDate = LocalDate.of(2020, 1, 1))) }
+      bookMetadataRepository.findById(books[1].id).let { bookMetadataRepository.update(it.copy(releaseDate = LocalDate.of(2020, 1, 1))) }
+      bookMetadataRepository.findById(books[2].id).let { bookMetadataRepository.update(it.copy(releaseDate = LocalDate.of(2021, 1, 1))) }
+    }
+
+    @BeforeEach
+    fun makeReadLists() {
+      rlAllDiffDates = readListLifecycle.addReadList(
+        ReadList(
+          name = "All different dates",
+          ordered = false,
+          bookIds = listOf(2, 1).map { books[it].id }.toIndexedMap(),
+        ),
+      )
+
+      rlAllNullDates = readListLifecycle.addReadList(
+        ReadList(
+          name = "All null dates",
+          ordered = false,
+          bookIds = books.drop(3).map { it.id }.toIndexedMap(),
+        ),
+      )
+
+      rlAllBooks = readListLifecycle.addReadList(
+        ReadList(
+          name = "All books",
+          ordered = false,
+          bookIds = books.map { it.id }.toIndexedMap(),
+        ),
+      )
+    }
+
+    @Test
+    @WithMockCustomUser
+    fun `given unordered read lists when getting books then books are sorted by release date`() {
+      mockMvc.get("/api/v1/readlists/${rlAllDiffDates.id}/books")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.content.[*].['id']") { contains(listOf(1, 2).map { books[it].id }) }
+        }
+
+      mockMvc.get("/api/v1/readlists/${rlAllNullDates.id}/books")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.content.[*].['id']") { contains(listOf(3, 4).map { books[it].id }) }
+        }
+
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.content.[*].['id']") { contains(listOf(3, 4, 0, 1, 2).map { books[it].id }) }
+        }
+    }
+
+    @Test
+    @WithMockCustomUser
+    fun `given unordered read lists when getting book siblings then it is returned according to release date sort or not found`() {
+      // rlAllDiffDates: 1, 2
+      // first book: id=1
+      mockMvc.get("/api/v1/readlists/${rlAllDiffDates.id}/books/${books[1].id}/previous")
+        .andExpect { status { isNotFound() } }
+      mockMvc.get("/api/v1/readlists/${rlAllDiffDates.id}/books/${books[1].id}/next")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[2].id) }
+        }
+
+      // second book: id=2
+      mockMvc.get("/api/v1/readlists/${rlAllDiffDates.id}/books/${books[2].id}/previous")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[1].id) }
+        }
+      mockMvc.get("/api/v1/readlists/${rlAllDiffDates.id}/books/${books[2].id}/next")
+        .andExpect { status { isNotFound() } }
+
+      // rlAllNullDates: 3, 4
+      // first book: id=3
+      mockMvc.get("/api/v1/readlists/${rlAllNullDates.id}/books/${books[3].id}/previous")
+        .andExpect { status { isNotFound() } }
+      mockMvc.get("/api/v1/readlists/${rlAllNullDates.id}/books/${books[3].id}/next")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[4].id) }
+        }
+
+      // second book: id=4
+      mockMvc.get("/api/v1/readlists/${rlAllNullDates.id}/books/${books[4].id}/previous")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[3].id) }
+        }
+      mockMvc.get("/api/v1/readlists/${rlAllNullDates.id}/books/${books[4].id}/next")
+        .andExpect { status { isNotFound() } }
+
+      // rlAllBooks: 3, 4, 0, 1, 2
+      // first book: id=3
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[3].id}/previous")
+        .andExpect { status { isNotFound() } }
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[3].id}/next")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[4].id) }
+        }
+
+      // second book: id=4
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[4].id}/previous")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[3].id) }
+        }
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[4].id}/next")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[0].id) }
+        }
+
+      // third book: id=0
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[0].id}/previous")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[4].id) }
+        }
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[0].id}/next")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[1].id) }
+        }
+
+      // fourth book: id=1
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[1].id}/previous")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[0].id) }
+        }
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[1].id}/next")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[2].id) }
+        }
+
+      // last book: id=2
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[2].id}/previous")
+        .andExpect {
+          status { isOk() }
+          jsonPath("$.id") { value(books[1].id) }
+        }
+      mockMvc.get("/api/v1/readlists/${rlAllBooks.id}/books/${books[2].id}/next")
+        .andExpect { status { isNotFound() } }
+    }
+  }
 }