Overview
Book.io is a Web3 marketplace that lets you buy, read, and resell ebooks and audiobooks as digital assets you actually own. Each title is minted on-chain as a Decentralized Encrypted Asset, so a book can be sold or transferred like a print copy. Authors and publishers earn a share of every sale, including resales.
The project began as a question between cofounders Joshua Stone and Ben Illian: what if a digital book worked more like a physical one? They launched the first DEA — a copy of the Gutenberg Bible — on Cardano, and the catalog has since grown into a global storefront serving readers across many countries1. The platform sits in the media corner of the Cardano ecosystem and also supports Ethereum, Polygon, Algorand, and Base for minting.
Key Features
- A digital book you can resell. Every title is minted as a unique on-chain asset that can be sold, gifted, or transferred — closing the gap between owning a paperback and owning an ebook2.
- Encrypted files, decentralized storage. The book file is encrypted, broken into shards, and stored across decentralized storage. The on-chain asset acts as the access key that lets the reader app decrypt and reassemble the file2.
- Royalties on every resale. On-chain code automatically splits each sale between the author or publisher and Book.io, including secondary sales — so creators keep earning when readers pass a title along3.
- Verified Reading. Book.io's system measures real reading time inside its app, which feeds a loyalty program designed to reward people who actually finish what they buy4.
- Reader apps and a Creator Portal. A dedicated iOS app, Android app, and browser-based library let readers consume titles on any device, while a Creator Portal lets authors and small publishers mint their own DEAs without writing code5.
What to Expect
A new visitor lands on a storefront that looks closer to a bookstore than a typical NFT marketplace. You can browse by genre, author, format (ebook or audiobook), or by chain. Buying a title requires a compatible Cardano wallet (or a wallet for one of the supported chains for non-Cardano titles). Once a purchase is complete, the title appears in the Book.io reader, available on iOS, Android, or the web library.
For authors and publishers, Book.io operates more like a publishing partner than a self-serve NFT minter. The team has worked directly with rights holders on collections such as the Gutenberg Bible and the Cardano Foundation's I Can Aiken — released as a 2,000-copy on-chain print run for Cardano Academy3. The Creator Portal extends a lighter version of the same workflow to independent creators.
The project has a public footprint that backs up its claims: a Cardano Foundation case study, an official listing on cardano.org/apps, a CoinGecko-tracked STUFF token, and a $2 million ADA Project Catalyst Fund 13 award to expand publisher onboarding367.
