There is no universally accepted standard for EPUB versioning or for embedding machine-readable change logs within the EPUB container. The EPUB 3.3 specification mentions versioning in the <meta> tags (e.g., <meta property="schema:version"> ), but this is loosely defined and rarely enforced. Most publishers don't use it. An index cannot track what was never labeled.
It is a testament to the enduring power of the written word that in an age of high-definition video and immersive VR, one of the most potent destinations on the web is a plain white page with black text, listing files in reverse chronological order. index of epub books updated