I've had a useful, if not entirely entertaining back and forth with the version of 24HCD A-Z (the thing I did for last year's 24 Hr comic day) in the iTunes iBook store.
Chiefly the issues concern the layout of iBooks, which change radically from Landscape to Portrait mode... niot much of a problem in a regular book, but very significant for a picture book. The solution is to lock the book in Landscape mode, with a setting in iBooks Author Inspector, but for some reason the setting wasn't sticking:
In some ways it's good to have had these issues with the free book, with it's simple layout rather than running into issues when I eventually get round to publishing Ninja Dinaosaurs vs Pirate Robots.
The feedback from the iTunes Connect service has been helpful, and suggests fixes, and then dug deep into the problem when the suggested fixes didn't work.
This stands in contrast somewhat from the stories from app developers, but I appreciate the testing processes are going to be different, and there are more unknowns....
Anyway, the iBooks version of 24 HCD is back in the iTunes store:
When I get a little time I'll write a post on the submission process.