We offer about 9 different formats. This has always been subject to review re the evolving technology, and we are looking at the extra time we take to convert—and vet, which is the time-heavy part—all 9 of these formats.

What would be the feeling if we offered principally .mobi/.epub/.pdf/.html (basically our ‘mini’ offering)? Anybody in possession of one of those can use Calibre and/or Sigil to convert to other formats…

What we’d like to learn is whether anybody out there’s using a format other than one of those four, and if so, which. After two years, we’re pretty sure the tech has concentrated around those four—but without asking, we don’t know for sure.