Use sources in a book project

You can attach Content Sources when creating a new book project.

How to attach sources

1. Create your sources first (and wait until they’re Ready).
2. Go to New Book.
3. In “Select up to 3 content sources…”, choose up to 3 sources.
4. Submit the project.

Sources are optional — leave this blank if you don’t want to use sources.

See: Create a Content Source

What sources do (and don't do)

Think of sources as a knowledge base, not a blueprint. Your prompt determines the topic and structure; sources supply facts, examples, and terminology to draw from. The prompt is always the steering wheel.

Sources DO:

• provide extra factual grounding and terminology
• supply domain-specific examples and data
• influence what the book includes (best effort)

Sources DO NOT:

• set your tone or voice
• define the book's topic or table of contents
• finish a half-written manuscript
• rewrite or expand an existing book
• guarantee that the model will adopt a viewpoint it rejects
• provide automatic citations inside the book

Tip: If you want to build on existing writing, use your draft as reference material while writing a fresh book on the same subject—rather than expecting Youbooks to continue or rewrite it directly.

Citations inside books

Youbooks does not include citations inside the manuscript by default. (If every other sentence had a citation, it would be impractical for most non-fiction reading.)

You can still:

• add citations manually after export, if you need them for publishing or academic use.

Planned: Youbooks intends to offer a URL export so you can see the URLs scraped during internet research (if enabled).

Need help?

Use the support chat widget (bottom-right in the app), or email master@youbooks.com.

If you’re asking about a specific book, include your Project ID (you’ll find it on the book’s page).