: One of the oldest electronic libraries offering a wide variety of genres for free download or online reading.

Several digital libraries offer extensive collections of free and legal books in the FB2 format:

: While primarily a store, they have a dedicated "Free Books" collection that you can access after logging in. Recommended FB2 Readers

: A massive library where you can download books in multiple formats, including FB2, or use their "Reading Room" to read online without downloading.

: Focuses on new releases and popular works, providing descriptions, ratings, and FB2 download options.

Since FB2 files are structured specifically for e-readers, you'll need a compatible application to open them: