Auto-generate structured eBooks with n8n + Gemini Flash and export to Google Docs

Enter a title → Gemini generates chapter outline and structure → generates detailed content per chapter → writes to a Google Doc

Who

Content creators, marketers, and educators who need to batch-generate eBooks, whitepapers, or course materials

You get

After entering a topic in n8n, automatically output a complete Google Document eBook with a table of contents

You need

n8n · google-docs

Steps

1. Set the input title

   In the n8n workflow, locate the "Set the Input Fields" node and replace the Title field with your eBook topic. Example: "Provide me n8n beginners guide with chapters and high-level steps". After execution, this title flows into the next LLM chain.

2. Generate chapter structure (JSON mode)

   The "Ebook Thought Creation" node calls Gemini Flash to expand the title into a JSON object with metadata and a chapter list. It connects to a "Structured Output Parser" that enforces a fixed JSON Schema (fields: type, version, metadata, structure.chapters). A "Code" node then extracts the chapters array for downstream looping.

   Execution prompt · Source text。Ebook Thought Creation node text parameter (promptType=define)

   Copy prompt

   ={{ $json.Title }}
   
   Make sure to output as JSON

3. Generate detailed content per chapter

   The "Loop Over Items" node iterates over the chapters array. On each iteration, the "Set the title, objective" node formats the current chapter's title and objectives, then the "Generate Detailed Chapter Content" node calls Gemini to write the full chapter text. The loop continues until all chapters are processed.

   Execution prompt · Source text。Generate Detailed Chapter Content node text parameter (promptType=define)

   Copy prompt

   =Provide a detailed chapter explanation for the following
   
   Title : {{ $json.title }}
   Objective : 
   {{ $json.objectives }}

4. Create and update Google Doc

   On first execution, the "Create a Google Doc" node creates a new document titled with the book name (from the "Set the title, objective" node). Then the "Update Google Docs" node inserts the generated chapter content. After each chapter, the loop returns to "Loop Over Items" until all chapters are written to the same document.

You are an n8n workflow setup assistant. The user wants to recreate the "Generate structured eBooks with Gemini to Google Docs" template. Assist in this order:
1. Confirm the user has a self-hosted n8n (community nodes requirement).
2. Guide them to import workflow ID 5707 from the n8n template gallery, or manually recreate the nodes and connections.
3. Check credentials: googlePalmApi (Gemini) and googleDocsOAuth2Api (Google Docs).
4. Prompt the user to change the Title in "Set the Input Fields" to their actual topic.
5. Suggest a first execution to verify the JSON structure output from "Ebook Thought Creation".
6. If there are many chapters, warn about Gemini rate limits and token consumption.