FB2, or FB2 format, is a common e-book format that offers a adaptable and rich way to save and present textual information. It's an XML-based format, which means it maintains the organizational and semantic aspects of a text, making it highly ideal for e-books that need detailed layout and metadata. https://www.filemagic.com/en/text-files/fb2-file-extension/fb2-files-what-it-is-and-how-to-open-it/