diff --git a/apps/sim/blocks/blocks/google_books.ts b/apps/sim/blocks/blocks/google_books.ts
index 5b7e31aae..764ee0290 100644
--- a/apps/sim/blocks/blocks/google_books.ts
+++ b/apps/sim/blocks/blocks/google_books.ts
@@ -1,10 +1,12 @@
 import { GoogleBooksIcon } from '@/components/icons'
 import type { BlockConfig } from '@/blocks/types'
+import { AuthMode } from '@/blocks/types'
 
 export const GoogleBooksBlock: BlockConfig = {
   type: 'google_books',
   name: 'Google Books',
   description: 'Search and retrieve book information',
+  authMode: AuthMode.ApiKey,
   longDescription:
     'Search for books using the Google Books API. Find volumes by title, author, ISBN, or keywords, and retrieve detailed information about specific books including descriptions, ratings, and publication details.',
   docsLink: 'https://docs.sim.ai/tools/google_books',
@@ -120,6 +122,7 @@ export const GoogleBooksBlock: BlockConfig = {
         { label: 'Lite', id: 'lite' },
       ],
       value: () => 'full',
+      condition: { field: 'operation', value: 'volume_details' },
       mode: 'advanced',
     },
   ],
diff --git a/apps/sim/tools/google_books/volume_details.ts b/apps/sim/tools/google_books/volume_details.ts
index f50e23986..114a78361 100644
--- a/apps/sim/tools/google_books/volume_details.ts
+++ b/apps/sim/tools/google_books/volume_details.ts
@@ -29,6 +29,9 @@ interface GoogleBooksVolumeResponse {
       identifier: string
     }>
   }
+  error?: {
+    message?: string
+  }
 }
 
 export const googleBooksVolumeDetailsTool: ToolConfig<
@@ -81,6 +84,10 @@ export const googleBooksVolumeDetailsTool: ToolConfig<
   transformResponse: async (response: Response) => {
     const data: GoogleBooksVolumeResponse = await response.json()
 
+    if (data.error) {
+      throw new Error(`Google Books API error: ${data.error.message || 'Unknown error'}`)
+    }
+
     if (!data.volumeInfo) {
       throw new Error('Volume not found')
     }
diff --git a/apps/sim/tools/google_books/volume_search.ts b/apps/sim/tools/google_books/volume_search.ts
index 1f643c599..72ca1a783 100644
--- a/apps/sim/tools/google_books/volume_search.ts
+++ b/apps/sim/tools/google_books/volume_search.ts
@@ -155,6 +155,10 @@ export const googleBooksVolumeSearchTool: ToolConfig<
   transformResponse: async (response: Response) => {
     const data = await response.json()
 
+    if (data.error) {
+      throw new Error(`Google Books API error: ${data.error.message || 'Unknown error'}`)
+    }
+
     const items: GoogleBooksVolumeItem[] = data.items ?? []
     const volumes = items.map(extractVolumeInfo)