Quill: EPUB Book Reader

Quill is an offline EPUB reader built for people who care about books.

Powered by the Readium EPUB engine, Quill gives you a smooth, scrollable eBook reading experience with clean typography and precise layout control the kind of environment that actually lets you disappear into a good book.

Quill connects directly to Standard Ebooks, the gold standard for free classic books and public domain literature. Every title in their catalogue is meticulously formatted, beautifully typeset, and carefully proofread, miles ahead of the raw scans you find elsewhere. Alongside that, the full Project Gutenberg library of 70,000+ free books is right at your fingertips.

At the heart of Quill is Aira, your on-device AI reading companion. Aira indexes your books locally using a retrieval-augmented pipeline, then answers your questions with genuine comprehension grounded in the actual text. No summaries from the internet. No generic responses. Just honest, book-aware conversation, and because it functions as an offline reader, your data never leaves your device.

What Quill offers:

Offline EPUB reader built on the Readium SDK

Standard Ebooks catalogue - free, beautiful, properly made

Project Gutenberg library to discover and download 70,000+ free books

Aira on-device AI that reads your books with you

Reading insights: streaks, stats, and reading patterns

Clean Material 3 design with no clutter

Recent changes:
Quill 4.0.0: a rebuilt, spoiler-free Aira you can ask from any passage, Visualize Scenes, a refreshed reader with ambient sounds and night light, reading reminders, a new Discover tab and a brand new look.