#epub. A good thing: officially standardized by the W3C https://github.com/w3c/epubcheck . However, some auto-generated epub seems to be rubbish; 3 out of 4 of my epub readers failed to parse the epub, even after editing missing fields per https://www.edrlab.org/open-standards/anatomy-of-an-epub-3-file/ . I'm not sure how the 4th one managed it, but it's pretty ugly. Guess I'm sticking with #pdf on this one.
@worldsendless what are you doing with epubs? I use them for reading novels, but that’s about it.
