I think the best idea is to contact the book publishers, let them know that Adobe Digital Editions is not capable of delivering their book to you, and ask in what other, more reliable formats they can provide it.
I would agree. All of the posts that I have been interested - about 10 so far, have all been unsolved and no attempts at providing solutions or help. Does Adobe do anything on these forums to solve problems? How does one get support for a product that has no contact information or actual support? I can't believe that our DRM book manager uses this software and it is our only option. I can't access the book to actually read it, I can't transfer it to any of their "supported applications", and there is no real support other than how to install or remove. Hmmm, someone needs to re-read those books on what delivering a product entails.