EPUB (short for electronic publication) is an open XML-based digital book format which uses XHTML and CSS for document content.
EPUB (short for electronic publication) is an open XML-based digital book format which uses XHTML and CSS for document content. It is widely used in electronic ink devices as well as software ereaders. EPUB documents can be created easily using open-source and commercial tools. More information can be found at the International Digital Publishing Forum, which sponsors the EPUB format.