Here is a link the web site where I found a lot of the missing books I was interested in (I can't vouch for other people's interests, though): http://www.kobobooks.com/. They support multi-formats. I have not tried them yet (I may with one of their free books to make sure it all works well) but, like I said, I think I will wait for Entourage to get the books back in so I can purchase through them.

Who knows, maybe Kobo Books got their books yanked and got them back or they haven't been yanked yet. Or, maybe they worked out deals right from the start.