Google Expert Intelligence: Use Purchased Ebooks as Sources in Gemini Notebook

August 31, 2026Articles

On August 27, 2026, Google announced Expert Intelligence, an initiative that lets you add eligible ebooks purchased from Google Play Books directly to Gemini Notebook, formerly NotebookLM.

Once a book is in a notebook, you can ask questions about it and receive answers grounded in its content, with citations pointing back to relevant passages. You can also combine the book with your own notes or work documents, or turn its content into quizzes, Audio Overviews, infographics and other formats.

The name “Expert Intelligence” does not immediately explain what has changed. The important part is that the AI no longer has to rely only on knowledge absorbed during training. It can consult a book the reader has purchased and use that book as a source for its answer.

This article explains what Expert Intelligence can do, how it differs from the source options Gemini Notebook already had, and the eligibility rules and limitations you should know before using it.

The key change: books you buy can become AI sources

Item	What we know as of August 31, 2026
Expert Intelligence	A cross-Google initiative for using trusted content through Google AI products
First available in	Gemini Notebook
Sources you can add now	Eligible English-language ebooks purchased from Google Play Books
Eligible catalog	More than 100,000 books at launch, although eligibility varies by publisher, language and format
Planned expansion	The Gemini app, AI Mode in Google Search, third-party subscriptions, business research reports, textbooks and more

The first version of Expert Intelligence allows eligible books purchased from Google Play Books to be added directly as sources in Gemini Notebook.

What makes this significant is that the AI is not being asked to recall what a book might have said. A book enabled by its publisher and actually purchased by the reader can become a direct source for the answer. Gemini Notebook cites relevant passages, so you can move from the AI’s explanation back to the original text and check the context yourself.

That is materially different from asking a general chatbot to summarize a book it may or may not recall accurately. The source remains identifiable, the reader’s right to access it can be checked, and the answer can be compared with the author’s actual words.

Google launched the feature with more than 100,000 books from publishers including Bloomsbury, Macmillan, O’Reilly Media and Penguin Random House. That does not mean every title sold through Google Play Books is eligible.

Go beyond reading: ask questions grounded in the book

Adding an ebook to Gemini Notebook gives you more options than generating a short summary of the entire book. You can:

Ask how the author explains a specific topic
Open a citation and check the relevant passage in context
Create quizzes, study guides, Audio Overviews, mind maps and other materials from the book
Compare multiple eligible books in one notebook
Add your own notes or documents and apply the book’s ideas to a specific problem

Gemini Notebook is designed to provide grounded answers based on the sources you add. Expert Intelligence expands those sources to include commercially published ebooks that publishers have enabled for this use.

Google’s announcement gives examples such as a manager combining a leadership book with a real workplace challenge, or a reader combining a photo of the food in their refrigerator with a book about healthy eating. The goal is not merely to read general advice from an author. It is to help you work out how that advice could apply to your own situation.

How to add an eligible Play Books title

Open Gemini Notebook and sign in with the same Google Account you use for Google Play Books.
Create a new notebook or open one you already own.
Select “Add sources,” then choose “Play Books.”
Select an eligible book you have purchased and add it as a source.

Ineligible books may still appear in the list, but they will be grayed out and cannot be selected. On a Google Play Books product page, you can also open the “Tools” badge near the page count and check whether Gemini Notebook is listed. A book you already own is eligible if its details include a “Use with Gemini Notebook” button.

Check for that eligibility indicator before buying a book specifically for this feature. The catalog will change over time, so you should not assume that every title from a participating publisher is supported.

Why this is different from uploading a file

Gemini Notebook already supported sources such as PDFs, EPUB files, webpages and Google Docs. You may therefore wonder why an ebook needs a separate feature at all.

The difference is that Expert Intelligence provides an authorized route from a purchased Play Books title to Gemini Notebook. You do not have to extract a DRM-protected book into a file or copy large sections of text. The publisher enables the title, and Google verifies the purchasing entitlement on your account before the book can be used.

PDF and EPUB files that you upload to your own Google Play Books library do not become Play Books sources in Gemini Notebook. Uploading a file you have the right to use directly to Gemini Notebook remains a separate source option.

Sharing a notebook does not share book access

The rules for shared notebooks make the copyright and licensing controls especially clear.

If you share a notebook that contains an eligible book, your collaborator does not automatically gain permission to read or question that book. They need to purchase their own copy through Google Play Books. Without that entitlement, the book is unavailable to them inside the shared notebook.

This adds some friction, but it prevents one purchase from distributing the content of an ebook across an entire team. It also shows that Expert Intelligence is tied to book ownership rather than being another form of file sharing.

The strongest use case combines a book with your own material

A conventional reading note may be enough if all you want is a summary of one book. Expert Intelligence becomes more useful when you put a specialist book and your own information in the same notebook.

Use case	Sources to combine	Example question
Management	A leadership book + meeting notes	Using the author’s approach, what should I clarify first about this problem?
Technical learning	A technical book + your design document	Which parts of this design depart from the book’s principles? Explain why and cite the relevant passages.
Coursework or certification	A study guide + lecture notes	Create a review quiz covering the topics from this lecture and explain why each wrong answer is incorrect.
Planning	A marketing book + customer survey responses	What patterns emerge if these responses are organized using the framework in the book?

As we explained in “NotebookLM Becomes Gemini Notebook: More Than a Name Change,” Gemini Notebook is expanding from a place where you read saved material into a workspace where you think with that material. Expert Intelligence is best understood as a way to bring commercially published books into that workspace.

Five limitations to know

Only select English-language ebooks are eligible: Google’s help page currently describes the catalog as select English-language ebooks. It does not say that Japanese-language books are supported.
You need the Google Play Books edition: Owning a print copy or an ebook from another store, such as Kindle, does not transfer that entitlement to Google Play Books.
Not every book from a participating publisher is included: Eligibility depends on publisher approval, language and book format.
Collaborators need their own copies: Sharing a notebook does not transfer the right to use the book.
You still need to verify the AI’s interpretation: Even when an answer is grounded in the book, the AI can misunderstand your question or miss important context. For consequential decisions, open the citation and read the surrounding passage.

If you combine a book with work documents, journal entries, photos or other personal material, check whether those sources contain confidential or personal information before adding them. A trustworthy book does not automatically make every other source in the notebook safe to share with an AI service.

AI Jiten’s take: licensed access matters more than expert-sounding prose

Generative AI has long been able to produce authoritative-sounding prose when asked to “answer as an expert.” A professional tone, however, does not prove that the answer is based on a real specialist publication.

The value of Expert Intelligence is not that it makes an AI sound more like an expert. It provides access to a verifiable source—the book you purchased—while preserving publisher permission and the reader’s purchasing entitlement. Rather than attempting to reproduce an author’s ideas from a model’s training, Gemini Notebook refers to a book the reader owns as a source.

If this approach expands, it could make AI convenience more compatible with the way authors and publishers sell their work. If professional subscriptions, business reports and textbooks eventually work the same way, AI could move away from being a tool that appears to know everything and toward becoming a tool that reasons across material you are legitimately allowed to access.

That does not make the AI itself an expert, despite the product name. You still need to check citations, distinguish the author’s claims from the AI’s suggestions, and make the final judgment yourself.

Summary

Expert Intelligence is a cross-Google initiative for using trusted content through Google AI products.
Its first feature lets you add eligible books purchased from Google Play Books to Gemini Notebook.
You can question the book, check citations, and generate quizzes, Audio Overviews, infographics and other formats.
Combining a specialist book with your own notes or work documents can help apply its ideas to a concrete problem.
The current catalog covers select English-language ebooks; a print copy or purchase from another store does not carry over.
Collaborators need to purchase their own copies, and you should still check the passages cited by the AI.

If you already own English-language professional books through Google Play Books, open “Add sources” in Gemini Notebook and check whether Play Books lists any of them as eligible. Before purchasing a new book specifically for this feature, look for the “Tools” badge or “Use with Gemini Notebook” button on the product page.

Sources checked August 31, 2026

Eligible books, supported languages and participating products may change. This article reflects information available in Google’s official announcement and help documentation as of August 31, 2026.