: All data, including images (stored as Base64), is contained within a single XML file.
: Books are often distributed as .fb2.zip files to save space; most modern readers can open these without unzipping them.
: Unlike simple text files, FB2 files contain specific tags for metadata (author, title, genre), chapters, epigraphs, and footnotes.
: The format generally does not support digital rights management, making it highly portable. Where to Download FB2 Books