diff --git a/client/components/app/LazyBookshelf.vue b/client/components/app/LazyBookshelf.vue
index 08ed1496..c0798d19 100644
--- a/client/components/app/LazyBookshelf.vue
+++ b/client/components/app/LazyBookshelf.vue
@@ -1,12 +1,15 @@
 <template>
   <div id="bookshelf" class="w-full overflow-y-auto">
     <template v-for="shelf in totalShelves">
-      <div :key="shelf" :id="`shelf-${shelf - 1}`" class="w-full px-4 sm:px-8 relative" :class="{ bookshelfRow: !isAlternativeBookshelfView }" :style="{ height: shelfHeight + 'px' }">
-        <div v-if="!isAlternativeBookshelfView" class="bookshelfDivider w-full absolute bottom-0 left-0 right-0 z-20" :class="`h-${shelfDividerHeightIndex}`" />
+      <div :key="shelf" :id="`shelf-${shelf - 1}`" class="w-full px-4 sm:px-8 relative"
+        :class="{ bookshelfRow: !isAlternativeBookshelfView }" :style="{ height: shelfHeight + 'px' }">
+        <div v-if="!isAlternativeBookshelfView" class="bookshelfDivider w-full absolute bottom-0 left-0 right-0 z-20"
+          :class="`h-${shelfDividerHeightIndex}`" />
       </div>
     </template>
 
-    <div v-if="initialized && !totalShelves && !hasFilter && entityName === 'books'" class="w-full flex flex-col items-center justify-center py-12">
+    <div v-if="initialized && !totalShelves && !hasFilter && entityName === 'books'"
+      class="w-full flex flex-col items-center justify-center py-12">
       <p class="text-center text-2xl font-book mb-4 py-4">{{ libraryName }} Library is empty!</p>
       <div v-if="userIsAdminOrUp" class="flex">
         <ui-btn to="/config" color="primary" class="w-52 mr-2">Configure Scanner</ui-btn>
@@ -319,7 +322,6 @@ export default {
           this.totalEntities = payload.total
           this.totalShelves = Math.ceil(this.totalEntities / this.entitiesPerShelf)
           this.entities = new Array(this.totalEntities)
-          this.$eventBus.$emit('bookshelf-total-entities', this.totalEntities)
         }
 
         for (let i = 0; i < payload.results.length; i++) {
@@ -329,8 +331,21 @@ export default {
             this.entityComponentRefs[index].setEntity(this.entities[index])
           }
         }
+
+        this.$eventBus.$emit('bookshelf-total-entities', this.getEntitiesCount())
       }
     },
+    getEntitiesCount() {
+      let uniqueEntities = new Set()
+      this.entities.forEach(entity => {
+        if (entity.collapsedSeries) {
+          entity.collapsedSeries.libraryItemIds.forEach(uniqueEntities.add, uniqueEntities)
+        } else {
+          uniqueEntities.add(entity.id)
+        }
+      });
+      return uniqueEntities.size
+    },
     loadPage(page) {
       this.pagesLoaded[page] = true
       this.fetchEntites(page)
@@ -513,7 +528,7 @@ export default {
         if (indexOf >= 0) {
           this.entities = this.entities.filter((ent) => ent.id !== libraryItem.id)
           this.totalEntities = this.entities.length
-          this.$eventBus.$emit('bookshelf-total-entities', this.totalEntities)
+          this.$eventBus.$emit('bookshelf-total-entities', this.getEntitiesCount())
           this.executeRebuild()
         }
       }
@@ -551,7 +566,7 @@ export default {
       if (indexOf >= 0) {
         this.entities = this.entities.filter((ent) => ent.id !== collection.id)
         this.totalEntities = this.entities.length
-        this.$eventBus.$emit('bookshelf-total-entities', this.totalEntities)
+        this.$eventBus.$emit('bookshelf-total-entities', this.getEntitiesCount())
         this.executeRebuild()
       }
     },
@@ -715,6 +730,7 @@ export default {
 .bookshelfRow {
   background-image: var(--bookshelf-texture-img);
 }
+
 .bookshelfDivider {
   background: rgb(149, 119, 90);
   background: var(--bookshelf-divider-bg);
diff --git a/client/components/cards/LazyBookCard.vue b/client/components/cards/LazyBookCard.vue
index d437c67d..22b064de 100644
--- a/client/components/cards/LazyBookCard.vue
+++ b/client/components/cards/LazyBookCard.vue
@@ -1,106 +1,160 @@
 <template>
-  <div ref="card" :id="`book-card-${index}`" :style="{ minWidth: width + 'px', maxWidth: width + 'px', height: height + 'px' }" class="rounded-sm z-10 bg-primary cursor-pointer box-shadow-book" @mousedown.prevent @mouseup.prevent @mousemove.prevent @mouseover="mouseover" @mouseleave="mouseleave" @click="clickCard">
+  <div ref="card" :id="`book-card-${index}`"
+    :style="{ minWidth: width + 'px', maxWidth: width + 'px', height: height + 'px' }"
+    class="rounded-sm z-10 bg-primary cursor-pointer box-shadow-book" @mousedown.prevent @mouseup.prevent
+    @mousemove.prevent @mouseover="mouseover" @mouseleave="mouseleave" @click="clickCard">
     <!-- When cover image does not fill -->
     <div v-show="showCoverBg" class="absolute top-0 left-0 w-full h-full overflow-hidden rounded-sm bg-primary">
       <div class="absolute cover-bg" ref="coverBg" />
     </div>
 
     <!-- Alternative bookshelf title/author/sort -->
-    <div v-if="isAlternativeBookshelfView || isAuthorBookshelfView" class="absolute left-0 z-50 w-full" :style="{ bottom: `-${titleDisplayBottomOffset}rem` }">
+    <div v-if="isAlternativeBookshelfView || isAuthorBookshelfView" class="absolute left-0 z-50 w-full"
+      :style="{ bottom: `-${titleDisplayBottomOffset}rem` }">
       <p class="truncate" :style="{ fontSize: 0.9 * sizeMultiplier + 'rem' }">
         {{ displayTitle }}
       </p>
-      <p class="truncate text-gray-400" :style="{ fontSize: 0.8 * sizeMultiplier + 'rem' }">{{ displayLineTwo || '&nbsp;' }}</p>
-      <p v-if="displaySortLine" class="truncate text-gray-400" :style="{ fontSize: 0.8 * sizeMultiplier + 'rem' }">{{ displaySortLine }}</p>
+      <p class="truncate text-gray-400" :style="{ fontSize: 0.8 * sizeMultiplier + 'rem' }">{{ displayLineTwo ||
+          '&nbsp;'
+      }}</p>
+      <p v-if="displaySortLine" class="truncate text-gray-400" :style="{ fontSize: 0.8 * sizeMultiplier + 'rem' }">{{
+          displaySortLine
+      }}</p>
     </div>
 
-    <div v-if="booksInSeries" class="absolute z-20 top-1.5 right-1.5 rounded-md leading-3 text-sm p-1 font-semibold text-white flex items-center justify-center" style="background-color: #cd9d49dd">{{ booksInSeries }}</div>
+    <div v-if="seriesSequenceList"
+      class="absolute z-20 top-1.5 right-1.5 rounded-md leading-3 text-sm p-1 font-semibold text-white flex items-center justify-center bg-black bg-opacity-90 box-shadow-md"
+      style="background-color: #78350f">#{{ seriesSequenceList }}</div>
+    <div v-else-if="booksInSeries"
+      class="absolute z-20 top-1.5 right-1.5 rounded-md leading-3 text-sm p-1 font-semibold text-white flex items-center justify-center"
+      style="background-color: #cd9d49dd">{{ booksInSeries }}</div>
 
     <div class="w-full h-full absolute top-0 left-0 rounded overflow-hidden z-10">
-      <div v-show="libraryItem && !imageReady" class="absolute top-0 left-0 w-full h-full flex items-center justify-center" :style="{ padding: sizeMultiplier * 0.5 + 'rem' }">
-        <p :style="{ fontSize: sizeMultiplier * 0.8 + 'rem' }" class="font-book text-gray-300 text-center">{{ title }}</p>
+      <div v-show="libraryItem && !imageReady"
+        class="absolute top-0 left-0 w-full h-full flex items-center justify-center"
+        :style="{ padding: sizeMultiplier * 0.5 + 'rem' }">
+        <p :style="{ fontSize: sizeMultiplier * 0.8 + 'rem' }" class="font-book text-gray-300 text-center">{{ title }}
+        </p>
       </div>
 
       <!-- Cover Image -->
-      <img v-show="libraryItem" ref="cover" :src="bookCoverSrc" class="w-full h-full transition-opacity duration-300" :class="showCoverBg ? 'object-contain' : 'object-fill'" @load="imageLoaded" :style="{ opacity: imageReady ? 1 : 0 }" />
+      <img v-show="libraryItem" ref="cover" :src="bookCoverSrc" class="w-full h-full transition-opacity duration-300"
+        :class="showCoverBg ? 'object-contain' : 'object-fill'" @load="imageLoaded"
+        :style="{ opacity: imageReady ? 1 : 0 }" />
 
       <!-- Placeholder Cover Title & Author -->
-      <div v-if="!hasCover" class="absolute top-0 left-0 right-0 bottom-0 w-full h-full flex items-center justify-center" :style="{ padding: placeholderCoverPadding + 'rem' }">
+      <div v-if="!hasCover"
+        class="absolute top-0 left-0 right-0 bottom-0 w-full h-full flex items-center justify-center"
+        :style="{ padding: placeholderCoverPadding + 'rem' }">
         <div>
-          <p class="text-center font-book" style="color: rgb(247 223 187)" :style="{ fontSize: titleFontSize + 'rem' }">{{ titleCleaned }}</p>
+          <p class="text-center font-book" style="color: rgb(247 223 187)" :style="{ fontSize: titleFontSize + 'rem' }">
+            {{ titleCleaned }}</p>
         </div>
       </div>
-      <div v-if="!hasCover" class="absolute left-0 right-0 w-full flex items-center justify-center" :style="{ padding: placeholderCoverPadding + 'rem', bottom: authorBottom + 'rem' }">
-        <p class="text-center font-book" style="color: rgb(247 223 187); opacity: 0.75" :style="{ fontSize: authorFontSize + 'rem' }">{{ authorCleaned }}</p>
+      <div v-if="!hasCover" class="absolute left-0 right-0 w-full flex items-center justify-center"
+        :style="{ padding: placeholderCoverPadding + 'rem', bottom: authorBottom + 'rem' }">
+        <p class="text-center font-book" style="color: rgb(247 223 187); opacity: 0.75"
+          :style="{ fontSize: authorFontSize + 'rem' }">{{ authorCleaned }}</p>
       </div>
     </div>
 
     <!-- No progress shown for collapsed series in library and podcasts (unless showing podcast episode) -->
-    <div v-if="!booksInSeries && (!isPodcast || episodeProgress)" class="absolute bottom-0 left-0 h-1 shadow-sm max-w-full z-10 rounded-b" :class="itemIsFinished ? 'bg-success' : 'bg-yellow-400'" :style="{ width: width * userProgressPercent + 'px' }"></div>
+    <div v-if="!booksInSeries && (!isPodcast || episodeProgress)"
+      class="absolute bottom-0 left-0 h-1 shadow-sm max-w-full z-10 rounded-b"
+      :class="itemIsFinished ? 'bg-success' : 'bg-yellow-400'" :style="{ width: width * userProgressPercent + 'px' }">
+    </div>
     <!-- Finished progress bar for collapsed series -->
-    <div v-else-if="booksInSeries && seriesIsFinished" class="absolute bottom-0 left-0 h-1 shadow-sm max-w-full z-10 rounded-b bg-success" :style="{ width: width * userProgressPercent + 'px' }"></div>
+    <div v-else-if="booksInSeries && seriesIsFinished"
+      class="absolute bottom-0 left-0 h-1 shadow-sm max-w-full z-10 rounded-b bg-success"
+      :style="{ width: width * userProgressPercent + 'px' }"></div>
 
     <!-- Overlay is not shown if collapsing series in library -->
-    <div v-show="!booksInSeries && libraryItem && (isHovering || isSelectionMode || isMoreMenuOpen) && !processing" class="w-full h-full absolute top-0 left-0 z-10 bg-black rounded hidden md:block" :class="overlayWrapperClasslist">
+    <div v-show="!booksInSeries && libraryItem && (isHovering || isSelectionMode || isMoreMenuOpen) && !processing"
+      class="w-full h-full absolute top-0 left-0 z-10 bg-black rounded hidden md:block"
+      :class="overlayWrapperClasslist">
       <div v-show="showPlayButton" class="h-full flex items-center justify-center pointer-events-none">
-        <div class="hover:text-white text-gray-200 hover:scale-110 transform duration-200 pointer-events-auto" @click.stop.prevent="play">
+        <div class="hover:text-white text-gray-200 hover:scale-110 transform duration-200 pointer-events-auto"
+          @click.stop.prevent="play">
           <span class="material-icons" :style="{ fontSize: playIconFontSize + 'rem' }">play_circle_filled</span>
         </div>
       </div>
 
       <div v-show="showReadButton" class="h-full flex items-center justify-center pointer-events-none">
-        <div class="hover:text-white text-gray-200 hover:scale-110 transform duration-200 pointer-events-auto" @click.stop.prevent="clickReadEBook">
+        <div class="hover:text-white text-gray-200 hover:scale-110 transform duration-200 pointer-events-auto"
+          @click.stop.prevent="clickReadEBook">
           <span class="material-icons" :style="{ fontSize: playIconFontSize + 'rem' }">auto_stories</span>
         </div>
       </div>
 
-      <div v-if="userCanUpdate" v-show="!isSelectionMode" class="absolute cursor-pointer hover:text-yellow-300 hover:scale-125 transform duration-150 top-0 right-0" :style="{ padding: 0.375 * sizeMultiplier + 'rem' }" @click.stop.prevent="editClick">
+      <div v-if="userCanUpdate" v-show="!isSelectionMode"
+        class="absolute cursor-pointer hover:text-yellow-300 hover:scale-125 transform duration-150 top-0 right-0"
+        :style="{ padding: 0.375 * sizeMultiplier + 'rem' }" @click.stop.prevent="editClick">
         <span class="material-icons" :style="{ fontSize: sizeMultiplier + 'rem' }">edit</span>
       </div>
 
-      <div class="absolute cursor-pointer hover:text-yellow-300 hover:scale-125 transform duration-100" :style="{ top: 0.375 * sizeMultiplier + 'rem', left: 0.375 * sizeMultiplier + 'rem' }" @click.stop.prevent="selectBtnClick">
-        <span class="material-icons" :class="selected ? 'text-yellow-400' : ''" :style="{ fontSize: 1.25 * sizeMultiplier + 'rem' }">{{ selected ? 'radio_button_checked' : 'radio_button_unchecked' }}</span>
+      <div class="absolute cursor-pointer hover:text-yellow-300 hover:scale-125 transform duration-100"
+        :style="{ top: 0.375 * sizeMultiplier + 'rem', left: 0.375 * sizeMultiplier + 'rem' }"
+        @click.stop.prevent="selectBtnClick">
+        <span class="material-icons" :class="selected ? 'text-yellow-400' : ''"
+          :style="{ fontSize: 1.25 * sizeMultiplier + 'rem' }">{{ selected ? 'radio_button_checked' :
+              'radio_button_unchecked'
+          }}</span>
       </div>
 
       <!-- More Menu Icon -->
-      <div ref="moreIcon" v-show="!isSelectionMode" class="hidden md:block absolute cursor-pointer hover:text-yellow-300 300 hover:scale-125 transform duration-150" :style="{ bottom: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem' }" @click.stop.prevent="clickShowMore">
+      <div ref="moreIcon" v-show="!isSelectionMode"
+        class="hidden md:block absolute cursor-pointer hover:text-yellow-300 300 hover:scale-125 transform duration-150"
+        :style="{ bottom: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem' }"
+        @click.stop.prevent="clickShowMore">
         <span class="material-icons" :style="{ fontSize: 1.2 * sizeMultiplier + 'rem' }">more_vert</span>
       </div>
     </div>
 
     <!-- Processing/loading spinner overlay -->
-    <div v-if="processing" class="w-full h-full absolute top-0 left-0 z-10 bg-black bg-opacity-40 rounded flex items-center justify-center">
+    <div v-if="processing"
+      class="w-full h-full absolute top-0 left-0 z-10 bg-black bg-opacity-40 rounded flex items-center justify-center">
       <widgets-loading-spinner size="la-lg" />
     </div>
 
     <!-- Series name overlay -->
-    <div v-if="booksInSeries && libraryItem && isHovering" class="w-full h-full absolute top-0 left-0 z-10 bg-black bg-opacity-60 rounded flex items-center justify-center" :style="{ padding: sizeMultiplier + 'rem' }">
+    <div v-if="booksInSeries && libraryItem && isHovering"
+      class="w-full h-full absolute top-0 left-0 z-10 bg-black bg-opacity-60 rounded flex items-center justify-center"
+      :style="{ padding: sizeMultiplier + 'rem' }">
       <p class="text-gray-200 text-center" :style="{ fontSize: 1.1 * sizeMultiplier + 'rem' }">{{ series }}</p>
     </div>
 
     <!-- Error widget -->
     <ui-tooltip v-if="showError" :text="errorText" class="absolute bottom-4 left-0 z-10">
-      <div :style="{ height: 1.5 * sizeMultiplier + 'rem', width: 2.5 * sizeMultiplier + 'rem' }" class="bg-error rounded-r-full shadow-md flex items-center justify-end border-r border-b border-red-300">
-        <span class="material-icons text-red-100 pr-1" :style="{ fontSize: 0.875 * sizeMultiplier + 'rem' }">priority_high</span>
+      <div :style="{ height: 1.5 * sizeMultiplier + 'rem', width: 2.5 * sizeMultiplier + 'rem' }"
+        class="bg-error rounded-r-full shadow-md flex items-center justify-end border-r border-b border-red-300">
+        <span class="material-icons text-red-100 pr-1"
+          :style="{ fontSize: 0.875 * sizeMultiplier + 'rem' }">priority_high</span>
       </div>
     </ui-tooltip>
 
-    <div v-if="rssFeed && !isSelectionMode && !isHovering" class="absolute text-success top-0 left-0 z-10" :style="{ padding: 0.375 * sizeMultiplier + 'rem' }">
+    <div v-if="rssFeed && !isSelectionMode && !isHovering" class="absolute text-success top-0 left-0 z-10"
+      :style="{ padding: 0.375 * sizeMultiplier + 'rem' }">
       <span class="material-icons" :style="{ fontSize: sizeMultiplier * 1.5 + 'rem' }">rss_feed</span>
     </div>
 
     <!-- Series sequence -->
-    <div v-if="seriesSequence && !isHovering && !isSelectionMode" class="absolute rounded-lg bg-black bg-opacity-90 box-shadow-md z-10" :style="{ top: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem', padding: `${0.1 * sizeMultiplier}rem ${0.25 * sizeMultiplier}rem` }">
+    <div v-if="seriesSequence && !isHovering && !isSelectionMode"
+      class="absolute rounded-lg bg-black bg-opacity-90 box-shadow-md z-10"
+      :style="{ top: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem', padding: `${0.1 * sizeMultiplier}rem ${0.25 * sizeMultiplier}rem` }">
       <p :style="{ fontSize: sizeMultiplier * 0.8 + 'rem' }">#{{ seriesSequence }}</p>
     </div>
 
     <!-- Podcast Episode # -->
-    <div v-if="recentEpisodeNumber && !isHovering && !isSelectionMode && !processing" class="absolute rounded-lg bg-black bg-opacity-90 box-shadow-md z-10" :style="{ top: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem', padding: `${0.1 * sizeMultiplier}rem ${0.25 * sizeMultiplier}rem` }">
+    <div v-if="recentEpisodeNumber && !isHovering && !isSelectionMode && !processing"
+      class="absolute rounded-lg bg-black bg-opacity-90 box-shadow-md z-10"
+      :style="{ top: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem', padding: `${0.1 * sizeMultiplier}rem ${0.25 * sizeMultiplier}rem` }">
       <p :style="{ fontSize: sizeMultiplier * 0.8 + 'rem' }">Episode #{{ recentEpisodeNumber }}</p>
     </div>
 
     <!-- Podcast Num Episodes -->
-    <div v-else-if="numEpisodes && !isHovering && !isSelectionMode" class="absolute rounded-full bg-black bg-opacity-90 box-shadow-md z-10 flex items-center justify-center" :style="{ top: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem', width: 1.25 * sizeMultiplier + 'rem', height: 1.25 * sizeMultiplier + 'rem' }">
+    <div v-else-if="numEpisodes && !isHovering && !isSelectionMode"
+      class="absolute rounded-full bg-black bg-opacity-90 box-shadow-md z-10 flex items-center justify-center"
+      :style="{ top: 0.375 * sizeMultiplier + 'rem', right: 0.375 * sizeMultiplier + 'rem', width: 1.25 * sizeMultiplier + 'rem', height: 1.25 * sizeMultiplier + 'rem' }">
       <p :style="{ fontSize: sizeMultiplier * 0.8 + 'rem' }">{{ numEpisodes }}</p>
     </div>
   </div>
@@ -236,6 +290,9 @@ export default {
       // Only added to item object when collapseSeries is enabled
       return this.collapsedSeries ? this.collapsedSeries.numBooks : 0
     },
+    seriesSequenceList() {
+      return this.collapsedSeries ? this.collapsedSeries.seriesSequenceList : null
+    },
     libraryItemIdsInSeries() {
       // Only added to item object when collapseSeries is enabled
       return this.collapsedSeries ? this.collapsedSeries.libraryItemIds || [] : []
@@ -515,7 +572,7 @@ export default {
           }
         }
         var mediaMetadata = libraryItem.media.metadata
-        if (mediaMetadata.series) {
+        if (mediaMetadata.series && Array.isArray(mediaMetadata.series)) {
           var newSeries = mediaMetadata.series.find((se) => se.id === this.series.id)
           if (newSeries) {
             // update selected series
diff --git a/server/controllers/LibraryController.js b/server/controllers/LibraryController.js
index a5bcfe73..0ee05571 100644
--- a/server/controllers/LibraryController.js
+++ b/server/controllers/LibraryController.js
@@ -162,32 +162,40 @@ class LibraryController {
     }
     var mediaIsBook = payload.mediaType === 'book'
 
+    // Step 1 - Filter the retrieved library items
     var filterSeries = null
     if (payload.filterBy) {
-      // If filtering by series, will include seriesName and seriesSequence on media metadata
-      filterSeries = (mediaIsBook && payload.filterBy.startsWith('series.')) ? libraryHelpers.decode(payload.filterBy.replace('series.', '')) : null
-      if (filterSeries === 'No Series') filterSeries = null
-
       libraryItems = libraryHelpers.getFilteredLibraryItems(libraryItems, payload.filterBy, req.user, this.rssFeedManager.feedsArray)
       payload.total = libraryItems.length
+
+      // Determining if we are filtering titles by a series, and if so, which series
+      filterSeries = (mediaIsBook && payload.filterBy.startsWith('series.')) ? libraryHelpers.decode(payload.filterBy.replace('series.', '')) : null
+      if (filterSeries === 'No Series') filterSeries = null
     }
 
+    // Step 2 - If selected, collapse library items by the series they belong to.
+    // If also filtering by series, will not collapse the filtered series as this would lead
+    // to series having a collapsed series that is just that series.
     if (payload.collapseseries) {
-      libraryItems = libraryHelpers.collapseBookSeries(libraryItems, this.db.series, filterSeries)
-      payload.total = libraryItems.length
+      let collapsedItems = libraryHelpers.collapseBookSeries(libraryItems, this.db.series, filterSeries)
+
+      if (!(collapsedItems.length == 1 && collapsedItems[0].collapsedSeries)) {
+        libraryItems = collapsedItems
+        payload.total = collapsedItems.length
+      }
     }
 
-
+    // Step 3 - Sort the retrieved library items.
     var sortArray = []
-    if (filterSeries) {
-      // Book media when filtering series will sort by the series sequence
+
+    // When on the series page, sort by sequence only
+    if (filterSeries && !payload.sortBy) {
       sortArray.push({ asc: (li) => li.media.metadata.getSeries(filterSeries).sequence })
     }
 
     if (payload.sortBy) {
-      var sortKey = payload.sortBy
-
       // old sort key TODO: should be mutated in dbMigration
+      var sortKey = payload.sortBy
       if (sortKey.startsWith('book.')) {
         sortKey = sortKey.replace('book.', 'media.metadata.')
       }
@@ -241,11 +249,11 @@ class LibraryController {
       }
     }
 
-    // Sort the items
     if (sortArray.length) {
       libraryItems = naturalSort(libraryItems).by(sortArray)
     }
 
+    // Step 4 - Transform the items to pass to the client side
     payload.results = libraryItems.map(li => {
       let json = payload.minified ? li.toJSONMinified() : li.toJSON()
 
@@ -257,7 +265,31 @@ class LibraryController {
           libraryItemIds: li.collapsedSeries.books.map(b => b.id),
           numBooks: li.collapsedSeries.books.length
         }
+
+        // If collapsing by series and filtering by a series, generate the list of sequences the collapsed
+        // series represents in the filtered series
+        if (filterSeries) {
+          json.collapsedSeries.seriesSequenceList = li.collapsedSeries.books
+            .map(b => parseFloat(b.filterSeriesSequence))
+            .filter(s => s)
+            .sort((a, b) => a - b)
+            .reduce((ranges, currentSequence) => {
+              let lastRange = ranges.at(-1)
+
+              if (lastRange && ((lastRange.end + 1) == currentSequence)) {
+                lastRange.end = currentSequence
+              }
+              else {
+                ranges.push({ start: currentSequence, end: currentSequence })
+              }
+
+              return ranges
+            }, [])
+            .map(r => r.start == r.end ? r.start : `${r.start}-${r.end}`)
+            .join(', ')
+        }
       } else if (filterSeries) {
+        // If filtering by series, make sure to include the series metadata
         json.media.metadata.series = li.media.metadata.getSeries(filterSeries)
       }
 
@@ -297,7 +329,7 @@ class LibraryController {
       minified: req.query.minified === '1'
     }
 
-    var series = libraryHelpers.getSeriesFromBooks(libraryItems, this.db.series, payload.filterBy, req.user, payload.minified)
+    var series = libraryHelpers.getSeriesFromBooks(libraryItems, this.db.series, null, payload.filterBy, req.user, payload.minified)
 
     const direction = payload.sortDesc ? 'desc' : 'asc'
     series = naturalSort(series).by([
diff --git a/server/utils/libraryHelpers.js b/server/utils/libraryHelpers.js
index f3d28acf..b33a1b8f 100644
--- a/server/utils/libraryHelpers.js
+++ b/server/utils/libraryHelpers.js
@@ -153,7 +153,7 @@ module.exports = {
     return data
   },
 
-  getSeriesFromBooks(books, allSeries, filterBy, user, minified = false) {
+  getSeriesFromBooks(books, allSeries, filterSeries, filterBy, user, minified = false) {
     const _series = {}
     const seriesToFilterOut = {}
     books.forEach((libraryItem) => {
@@ -179,6 +179,9 @@ module.exports = {
 
         const abJson = minified ? libraryItem.toJSONMinified() : libraryItem.toJSONExpanded()
         abJson.sequence = bookSeriesObj.sequence
+        if (filterSeries) {
+          abJson.filterSeriesSequence = libraryItem.media.metadata.getSeries(filterSeries).sequence
+        }
         if (!_series[bookSeriesObj.id]) {
           _series[bookSeriesObj.id] = {
             id: bookSeriesObj.id,
@@ -285,7 +288,7 @@ module.exports = {
     // Get series from the library items. If this list is being collapsed after filtering for a series,
     // don't collapse that series, only books that are in other series.
     var seriesObjects = this
-      .getSeriesFromBooks(libraryItems, series, null, null, true)
+      .getSeriesFromBooks(libraryItems, series, filterSeries, null, null, true)
       .filter(s => s.id != filterSeries)
 
     var filteredLibraryItems = []