Distribution & Metadata
EPUB 3.4: What Publishers Should Change, Validate, and Leave Alone
Understand the EPUB 3.4 draft, test new features, validate with EPUBCheck 5.4.0, and decide what to change or preserve in existing ebooks.
Distribution & Metadata
EPUB Annotations 1.0: What Publishers Should Prepare for Now
W3C published a new EPUB Annotations 1.0 Working Draft on September 24, 2026. Publishers should preserve stable structure, identifiers, privacy expectations, and edition relationships before annotations become portable across reading systems.