ePUBSecrets. ePUBSecrets.
Trade and Standards Organization for the Digital Publishing Industry. Mgylling/epub-testsuite. EPUB. EPUB (short for electronic publication; sometimes styled ePub) is a free and open e-book standard by the International Digital Publishing Forum (IDPF).
Files have the extension .epub. EPUB is designed for reflowable content, meaning that an EPUB reader can optimize text for a particular display device. EPUB also supports fixed-layout content.