[Ironic Note: While this site is responsive, the Google Trends graph, above, which shows relative search-volume for “EPUB” has fallen back to summer 2012 levels, may not display correctly on a phone or similar-sized device.] As it became clear to the IDPF that publishers weren’t going to give up on a crafted, beautiful, printable page, they added support for fixed-layout pages to EPUB. Publishers had said they wanted a single deliverable format that did it…
I’ve been tracking the relative popularity of electronic document file-formats for several years – here’s the February 2014 survey. Along the way I’ve noticed that the .com domain (and at… 98% of .com is HTML but 38% of .gov is PDF!