W3C tech in the news: "Google Is Now Indexing EPUB Files"

"Google announced that it is now indexing .epub documents, a format commonly used to print books for e-readers. Google is already showing EPUB books in the search index.

EPUB is an XML-based eBook publishing format based on a standard developed by the International Digital Publishing Forum, which in 2016 was subsequently merged with the World Wide Wide Web Consortium (W3C)."

https://www.searchenginejournal.com/google-is-now-indexing-epub-files/517586/