Every purchased book from iBooks pulls up in ADE completely blank, but yet every book I had downloaded for free from iBooks works just fine. I would assume it's a DRM issue, but ADE isn't asking for a login when I click on those books. They just open blank with no prompt. Anyone able to open purchased books from iBooks in ADE? I have 2.0.
I think iBooks uses an alternative Apple DRM system, which is much more limiting than the Adobe DRM.
Probably best where practical to buy books from a more open supplier (in particular, not Apple or Amazon).
For those you have already bought, you can probably (?) read iBooks on a PC using iTunes or some other Apple software.