My target for the holiday period is to finish at least one of the children's books I have in development hell.
The biggest issue was that iBooks author is a bit rubbish for creating static layout books, and when it does work it insists on using templates with tables of contents, and chapters... great for academic works, not so good for picture books.
Luckily Adobe In Design has an export to a static layout epub3 format, which will work nicely on an iPad, and I'm hoping will upload into the iBooks store with ease (just as soon as it's back from it's holidays)
So I did a quick trial adding pictures to pages, and exporting and iBooks on my mac opened it just fine.
I stuck the ePub in Dropbox and opened it on my iPad, and again it worked just fine.