How to Chat With an Ebook (EPUB) Using AI: A Step-by-Step Guide

To chat with an ebook, a tool reads the full text of the EPUB file and lets you ask about it in plain language — “What does chapter 4 argue about pricing power?” or “Where does the author first mention this concept?” — instead of you searching your ereader app or scrolling through chapters trying to relocate a passage you half-remember. The answer comes back grounded in the book's actual text, with a pointer back to where it found it.

Under the hood it works the same way as chatting with a PDF: the ebook is split into small chunks of text, each chunk is turned into an embedding, and your question retrieves the most relevant ones before a language model writes an answer from them. We cover the general mechanism in our RAG explainer; for an ebook the only real difference from a PDF is the file format it started in — an EPUB is a supported upload type alongside PDFs, Office files, and more.

1. Pick a tool that accepts EPUB uploads, not just PDFs.
2. Upload the .epub file and wait a few seconds while it's read and indexed.
3. Ask a broad question first, like “What is this book about?” or “Summarize the first three chapters,” to get your bearings.
4. Follow up with specific questions — a definition, an argument, a character or example the author uses to make a point.
5. Add a second book or your own reading notes to the same project if you want to compare what different authors say about the same subject.

Searching an ebook for a keyword only finds the exact word you typed, so it's useless if you remember the idea but not the phrasing. Chatting with an ebook works from meaning, not exact text — you can ask “Where does the author talk about switching costs?” even if that exact phrase never appears, and still get pointed to the right passage. That's the same retrieval approach behind chatting with a PDF or any other document Q&A workflow — it just happens to work just as well on a novel, textbook, or nonfiction ebook as it does on a report.

An ebook rarely stands alone — you might be reading it for a class alongside lecture slides, or researching a topic across several books and articles at once. Keeping the EPUB in the same project as your notes and slides or a related Word or PDF file means one question can pull from the book and your own material together, instead of you manually cross-referencing them. On Pro and Business plans you can also generate a quiz or practice exercises from a chapter to check what you actually retained.

Doxy lets you upload an EPUB the same way you'd chat with a PDF or chat with any other document: add it as a source, wait for it to index, and start asking. It fits the same notebook-style workflow as every other source type, so a book, a set of readings, and your own notes can all live in one project with citations back to the exact passage each answer came from.