: High-quality, formatted editions of public domain books. 3. Adding Your Own Sources (OPDS)

: This integration is fully functional on Android and desktop platforms ( Windows, Mac, Linux ). 2. Free Legal Libraries

: Over 75,000 free eBooks, mostly classics in the public domain.

For Russian-language readers, FBReader has a built-in integration with , the largest digital bookstore in Russia.

You aren't limited to the built-in stores. You can add any website that provides an . Purchasing books on ЛитРес book store - FBReader

FBReader: Where to Download Books and How to Add Them FBReader is one of the most versatile ebook readers, supporting formats like and ePub across Android, iOS, Windows, and macOS. One of its best features is the ability to download books directly within the app using OPDS (Open Publication Distribution System) catalogs. 1. Direct Integration: LitRes (ЛитРес)

: You can browse, purchase, and download books without leaving the app.