diff --git a/server/Database.js b/server/Database.js
index 3d4219e5af..e3fabe1f56 100644
--- a/server/Database.js
+++ b/server/Database.js
@@ -689,6 +689,34 @@ class Database {
     return this.libraryFilterData[libraryId].series.some(se => se.id === seriesId)
   }
 
+  /**
+   * Get author id for library by name. Uses library filter data if available
+   * 
+   * @param {string} libraryId 
+   * @param {string} authorName 
+   * @returns {Promise<string>} author id or null if not found 
+   */
+  async getAuthorIdByName(libraryId, authorName) {
+    if (!this.libraryFilterData[libraryId]) {
+      return (await this.authorModel.getOldByNameAndLibrary(authorName, libraryId))?.id || null
+    }
+    return this.libraryFilterData[libraryId].authors.find(au => au.name === authorName)?.id || null
+  }
+
+  /**
+   * Get series id for library by name. Uses library filter data if available
+   * 
+   * @param {string} libraryId 
+   * @param {string} seriesName 
+   * @returns {Promise<string>} series id or null if not found
+   */
+  async getSeriesIdByName(libraryId, seriesName) {
+    if (!this.libraryFilterData[libraryId]) {
+      return (await this.seriesModel.getOldByNameAndLibrary(seriesName, libraryId))?.id || null
+    }
+    return this.libraryFilterData[libraryId].series.find(se => se.name === seriesName)?.id || null
+  }
+
   /**
    * Reset numIssues for library
    * @param {string} libraryId 
diff --git a/server/scanner/BookScanner.js b/server/scanner/BookScanner.js
index 85bf8146f8..c738c52e33 100644
--- a/server/scanner/BookScanner.js
+++ b/server/scanner/BookScanner.js
@@ -186,11 +186,11 @@ class BookScanner {
         // Check for authors added
         for (const authorName of bookMetadata.authors) {
           if (!media.authors.some(au => au.name === authorName)) {
-            const existingAuthor = Database.libraryFilterData[libraryItemData.libraryId].authors.find(au => au.name === authorName)
-            if (existingAuthor) {
+            const existingAuthorId = await Database.getAuthorIdByName(libraryItemData.libraryId, authorName)
+            if (existingAuthorId) {
               await Database.bookAuthorModel.create({
                 bookId: media.id,
-                authorId: existingAuthor.id
+                authorId: existingAuthorId
               })
               libraryScan.addLog(LogLevel.DEBUG, `Updating book "${bookMetadata.title}" added author "${authorName}"`)
               authorsUpdated = true
@@ -221,11 +221,11 @@ class BookScanner {
         for (const seriesObj of bookMetadata.series) {
           const existingBookSeries = media.series.find(se => se.name === seriesObj.name)
           if (!existingBookSeries) {
-            const existingSeries = Database.libraryFilterData[libraryItemData.libraryId].series.find(se => se.name === seriesObj.name)
-            if (existingSeries) {
+            const existingSeriesId = await Database.getSeriesIdByName(libraryItemData.libraryId, seriesObj.name)
+            if (existingSeriesId) {
               await Database.bookSeriesModel.create({
                 bookId: media.id,
-                seriesId: existingSeries.id,
+                seriesId: existingSeriesId,
                 sequence: seriesObj.sequence
               })
               libraryScan.addLog(LogLevel.DEBUG, `Updating book "${bookMetadata.title}" added series "${seriesObj.name}"${seriesObj.sequence ? ` with sequence "${seriesObj.sequence}"` : ''}`)
@@ -443,10 +443,10 @@ class BookScanner {
     }
     if (bookMetadata.authors.length) {
       for (const authorName of bookMetadata.authors) {
-        const matchingAuthor = Database.libraryFilterData[libraryItemData.libraryId].authors.find(au => au.name === authorName)
-        if (matchingAuthor) {
+        const matchingAuthorId = await Database.getAuthorIdByName(libraryItemData.libraryId, authorName)
+        if (matchingAuthorId) {
           bookObject.bookAuthors.push({
-            authorId: matchingAuthor.id
+            authorId: matchingAuthorId
           })
         } else {
           // New author
@@ -463,10 +463,10 @@ class BookScanner {
     if (bookMetadata.series.length) {
       for (const seriesObj of bookMetadata.series) {
         if (!seriesObj.name) continue
-        const matchingSeries = Database.libraryFilterData[libraryItemData.libraryId].series.find(se => se.name === seriesObj.name)
-        if (matchingSeries) {
+        const matchingSeriesId = await Database.getSeriesIdByName(libraryItemData.libraryId, seriesObj.name)
+        if (matchingSeriesId) {
           bookObject.bookSeries.push({
-            seriesId: matchingSeries.id,
+            seriesId: matchingSeriesId,
             sequence: seriesObj.sequence
           })
         } else {