Ask questions while a passage is fresh, and keep the full conversation beside the book.
Book Chat
Think in context
Think in context
Context is your thinking companion for books worth understanding.
Read deeper with the tools you already trust
EPUBPDFOpenAIAnthropicGeminiMistralxAIDeepSeek
Turn every book into a conversation
Ask questions as you read, bring passages into chat, and explore ideas without losing your place.
Learn about AI Chat ->Your library stays yours
Context opens EPUBs and PDFs from a folder you choose, keeping your books and reading data on your Mac.
Learn about local-first reading ->Everything you need, right where you read
Highlight passages, add notes and bookmarks, and move through chapters without leaving the page.
Explore the reader ->A reading experience tuned to you
Tune theme and flow across your library, with type and layout controls made for EPUBs.
Learn about reading settings ->A new way to live with books.
Keep EPUBs and PDFs together in a library built from the files already on your Mac.
Local Library
Your books, your folder
Your books, your folder
Turn important lines into highlights and notes you can return to long after the chapter ends.
Annotations
Keep what matters
Keep what matters
Pick up exactly where you stopped, with reading progress saved quietly in the background.
Reading Progress
Never lose your place
Never lose your place
Choose the model you trust and use your own provider key for every conversation.
Your AI
Seven supported providers
Seven supported providers
Set a daily rhythm, track time spent reading, and watch finished books add up.
Reading Goals
Build a lasting habit
Build a lasting habit
Go deeper with every book
Use the right model for every question
Connect your preferred AI providers and choose the model that fits the way you think.
Explore models ->Answers grounded in your book
Add selected passages, PDF pages, or EPUB chapters to chat so each question carries the right context.
Learn about reading context ->Build a reading practice that lasts
Set goals, track your time, and see the books you finish come together over the year.
Explore reading goals ->