Use case: turn your reading into a study companion
Build a Custom AI from a set of books, courses, or videos and study inside it — ask questions, get quizzed, and connect ideas across everything you've read.
A study companion is a Custom AI built from the material you're learning — a set of books, a course, a stack of PDFs, a playlist of videos. Instead of re-reading, you talk to it: ask what chapter 4 actually argued, get quizzed before the exam, or trace an idea across everything in the set.
If you've used a notebook-style AI research tool, this is that idea living inside Eden — except the sources are your Library, the highlights are the ones you actually made, and the companion keeps your conversation history for the whole course of study.
Build it
Create a Custom AI named for the subject — "Philosophy of Mind", "Marketing 101", "The Charlie Munger Set" — and connect the material:
- Books and PDFs — drop them in; they land in your Library and attach as sources.
- Your highlights — the passages you marked are the companion's sense of what you found important.
- Course notes and videos — your own notes as live sources, saved videos with transcripts.
- The teacher — if the subject has a living voice behind it, attach them as a creator source and the companion can also mentor you from their broader work.
Instructions that make it a teacher rather than a summarizer:
You are my study companion for [subject], working only from the connected material. Explain ideas in plain language, then point me to the exact source passage. Quiz me when I ask — one question at a time, and make me answer before you explain. When I'm confused, find where my confusion contradicts the material and show me.
Starters: "Quiz me on this week's reading", "Explain [concept] like I'm new", "Where do these authors disagree?"
How studying with it feels
- Ask instead of re-read. "What was the argument in chapter 4?" gets the answer plus the passage it came from — the context line under each reply links straight to the source, so checking the original takes one click.
- Get quizzed. Active recall beats re-reading, and the companion never gets tired of asking.
- Connect across sources. "How does Kahneman's System 1 relate to what Munger calls psychological misjudgment?" is exactly the kind of question a narrowed set of books can answer well — and the open internet answers badly.
- Keep the thread. Your questions from week 2 are still there in week 10, which is a record of what confused you — the best possible review sheet.
Who this serves
Students, obviously — but also professionals working through a certification, creators researching a book of their own, and anyone doing the self-directed version of a syllabus. If you're collecting highlights in Eden already, the companion is ten minutes away.
Connecting knowledge to a Custom AI
Attach boards, notes, files, links, and creators. Live sources stay current on their own, and every answer shows you exactly which sources it used.
Use case: a mentor grounded in someone's real ideas
Turn a creator's body of work into someone you can talk to. Ask questions, get answers grounded in what they actually published, with the sources shown.
Chatting with your Library
The brain icon in chat surfaces saved items related to your conversation — one click attaches a note, highlight, or post as context for Eden's next reply.
Email us. A real person reads every message.
Tell us what you tried and where you got stuck. We answer within one business day.
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