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New translations, rare texts, and comprehensive summaries — included with Premium.
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The Premium catalogue
633 exclusive editions, new translations, rare texts, and comprehensive summaries — included with Premium.
Your personal reading companion
Lex AI understands books the way a well-read friend does. It makes recommendations, helps you understand what you're reading, and chats about all things books — whether you're browsing the library or reading something you uploaded yourself.
Intelligent Book Recommendations
Lex learns what you like and finds books that fit. Not just bestsellers. The weird, perfect picks you'd never find on your own.
In-Book AI Assistant
Lost on a character? Confused by the history? Ask Lex right inside the reader. It knows the book you're reading and answers without leaving the page.
Multi-Conversation Memory
Conversations persist. Pick up where you left off, keep context across books, and let Lex get smarter about you over time.
Literary Analysis on Demand
Break down themes, compare writing styles, unpack allegory. Real literary analysis from real scholarship, not SparkNotes summaries.
Reader Personality Insights
Ask "What kind of reader am I?" and get a real answer. Lex analyzes your history, highlights, and habits to reveal patterns you never noticed.
Constantly Evolving
New capabilities ship every week. Source citations, cross-book analysis, vocab building, discussion prompts. It keeps getting better.
See inside every book
X-Ray breaks down every book into its building blocks — characters, themes, chapter summaries, notable quotes, and discussion questions — before you even start reading.
Character Maps
Every character with their role, description, and relationships — protagonists, antagonists, and everyone in between.
Chapter Summaries
Expandable summaries with key quotes, themes, and characters for every chapter. Refresh your memory or preview what's ahead.
Themes & Analysis
Deep analysis of major themes with supporting evidence from the text. Understand what the author is really saying.
Notable Quotes
The best lines from each book, categorized and contextualized. Save them to your collection or share with friends.
Discussion Questions
Thought-provoking questions for book clubs, classrooms, or your own reflection. Each with follow-up prompts and relevant quotes.
Original Illustrations
Browse maps, portraits, engravings, and plates from the original editions — with captions and full-screen viewing.
No internet? No problem.
Download books and audiobooks to read anywhere — on planes, in subways, or wherever you find yourself without a connection. Pair with text-to-audio sync and ambient sounds for the ultimate listening experience.
Your Library, Anywhere
Download your entire library to your device. Every book is yours to read whenever, wherever.
Listen Without Streaming
Save any audiobook for offline listening. Perfect for long flights or commutes through dead zones.
Seamless Sync
Your progress, highlights, and notes sync automatically when you're back online.
Read more in less time.
Blitz mode uses Rapid Serial Visual Presentation to push your reading speed beyond what you thought possible.
Blitz Mode
Words flash one at a time at your chosen pace. Eliminates subvocalization and lets you tear through books.
Sentence Mode
Timed sentence-by-sentence presentation. Read faster without losing comprehension.
Adjustable Pace
100 to 750 WPM. Start slow and work up, or shift gears based on the text.
Read any book in your language
Translate entire books chapter by chapter. Read classic literature, rare texts, and foreign-language works in any language you choose.
Chapter-by-Chapter
Translate one chapter at a time. The original text is always available so you can compare side by side.
Bilingual Mode
Read with the original text and translation displayed side by side. Perfect for language learners and comparing translations.
Context-Aware
Understands literary context, idioms, and tone. Translations read naturally, not like machine output.
Turn any PDF into a beautiful ebook
Upload scanned documents, textbooks, or any PDF. Lex converts them into clean, reflowable EPUBs you can read with all the features you love.
Smart OCR
Handles scanned pages, photos, and complex layouts with high accuracy
Reflowable Text
Converted text adapts to any screen size with adjustable fonts and themes
Chapter Detection
Automatically detects chapters, headings, and structure from your PDF
All Your Books, One Place
Converted books appear alongside your library with full reading features
Plus everything that's already free
Premium builds on top of a platform that already gives you an extraordinary amount for free.
Getting smarter every week
We're actively building new capabilities. Premium subscribers get access to every new feature as it launches: source citations linking to exact passages, cross-book analysis, vocabulary building, discussion prompts, and much more. You're not just buying what exists today — you're investing in a platform that's rapidly evolving.
Ready to read smarter?
Exclusive editions and features that make every book better.