@Lemurion,
MY GOD INTERACTIVE MAPS. YES. I am so tired of having to flip back to page 1 to squint at some tiny map that the author had to squeeze onto one page to fit. Fantasy and Scifi could SERIOUSLY benefit from interactive maps. As well as map-videos that show the journey that occurred between the Chapter 4 / Chapter 5 jump.
If there's a "text only" version of these books also available for download, backwards compatibility shouldn't be an issue, I don't think.