ebookbookFormats & Files on EPUB
Which file types actually open, how conversion works, and where DRM changes the rules.
EPUB will open its own store books without a format lecture. The lecture starts when a file arrives from email, USB, Calibre, or another shop.
This section covers what actually opens, when conversion is worth the mess, and how DRM changes the answer. Typical inputs: EPUB 2, EPUB 3, fixed-layout EPUB, KEPUB as a Kobo flavor.
EPUB itself has no DRM. Stores may wrap EPUB in Adobe DRM, LCP, or vendor DRM.
Which file types open in EPUBA practical list of formats EPUB will open, what gets converted on the way in, and what still fails.Converting books for EPUB without breaking layoutWhen conversion is necessary for EPUB, what survives, and which source formats you should leave alone.DRM and personal copies in EPUBThe difference between a store license and a file you own, written for people using EPUB.