For readers who read to think
You've read the books.
Now think with them.
Syntopica imports your Amazon library and Kindle highlights, then helps you do what no other tool can: read one book deeper, or synthesize ideas across many — with every insight grounded in passages you actually marked.
Free during beta. No credit card required.
Most of what you read disappears
You read to learn. You highlight the good parts. Then those highlights sit in a notebook you never open, and the connections between books stay locked in your head — if they survive at all.
Scattered across platforms
Books on Amazon. Some on Goodreads. Highlights on your Kindle. Notes in five different apps. Nothing connected.
Highlights go to die
You marked brilliant passages in the moment. Now they sit unread. The insight that could change your thinking — forgotten.
No one connects the dots
That book on habits echoes that book on neuroscience. The biography confirms the philosophy. But you have to hold it all in your head.
Deep Reading
Get more from every book
Before you read, get an inspectional guide that maps the territory — core argument, key themes, questions to hold. After you read, get an analytical summary built from your own highlights: what you marked most, the patterns in your thinking, the passages that mattered to you.
Plus a chat that can answer anything about any book — grounded in your highlights when you have them, clearly labeled when drawing on broader knowledge.
Inspectional Reading Guide
Works for any book — even unreadSapiens — Yuval Noah Harari
Three revolutions — Cognitive, Agricultural, Scientific — explain how Homo sapiens came to dominate Earth...
- - Was the Agricultural Revolution truly "history's biggest fraud"?
- - How do shared myths enable large-scale cooperation?
Analytical Summary
Built from your highlightsThinking, Fast and Slow — Daniel Kahneman
Your 34 highlights cluster around cognitive biases in professional judgment, especially anchoring and availability heuristic...
Syntopical Reading
Think across your entire library
Group books into collections by theme. Then ask questions across all of them at once — what do your books agree on? Where do they disagree? What patterns emerge that you couldn't see from any single book alone?
Decision Making & Cognitive Bias
4 books · 127 highlights
What do my books say about why smart people make bad decisions?
Three of your books converge on a key insight: intelligence doesn't protect against cognitive bias — it often makes it worse. Kahneman argues that overconfidence scales with expertiseThinking, Fast and Slow, while Tetlock's research shows that the best forecasters actively fight their own certaintySuperforecasting. Ariely adds that the bias isn't random — it's predictableAbout this book
Syntopical Briefs
Export a structured synthesis across the entire collection — themes, disagreements, open questions, and your own stance. Markdown-formatted, ready to share.
Your whole library in two minutes
No manual entry. No CSV exports. No data wrangling.
Install the Chrome extension
It only activates on Amazon and Kindle pages. It never sees your Amazon password.
Add to Chrome — freeImport your library
Visit your Amazon library page and click import. Kindle eBooks, Audible audiobooks, physical purchases — years of books appear in seconds. Highlights come too.
Start thinking
Your books are automatically enriched with covers, author bios, series info, and awards. Explore reading guides, build collections, and synthesize across your library.
Everything else your library needs
Rich metadata
Every book enriched with covers, descriptions, author bios, series order, awards, and genres via Google Books, OpenLibrary, and Wikidata.
Notes & voice memos
Attach free-text notes to any book or collection. Record voice notes transcribed automatically.
Smart collections
Build collections manually or let semantic analysis suggest groupings from patterns in your highlights.
Half-star ratings
Rate books from 0.5 to 5 stars. Swipeable book rater to quickly rate your whole library.
Add from photo
Snap a photo of a bookshelf or a stack of books. Vision AI identifies them and adds them to your library.
Data export
Download your full library — books, highlights, collections, and stats — as a single JSON file. Your data is yours.
Your books have more to say.
Import your Amazon library. Get reading guides for every book. Build collections and synthesize across everything you've read.
Get Started FreeFree during beta. No credit card required.