How EPUB is used here In this channel's material, EPUB appears as a practical file format for getting a book's text into an AI assistant. Dwarkesh Patel demonstrates the workflow for interview prep when the model doesn't already know the book well:[^video@579] 1. Get the EPUB of the guest-relevant book. 2. Convert the EPUB to text with an online converter. 3. Upload the text to Project Knowledge in Claude. 4. Then — “I'll just have a bunch of chats” — asking questions like “how does he explain what groups made up modern Europeans?” because “it has all the context in there.” The uploaded book becomes a searchable, context-rich knowledge base you can interrogate during prep.[^video@579] Key points - EPUB is the source format you obtain for a book. - Its text (after conversion) is what actually gets uploaded to Claude's Project Knowledge. - The payoff is a searchable reference the model can use to answer grounded questions about the book.