We considered this a forgone coclusion, but the LATimes reports that Apple's iBookStore will encrypt book purchases with Apple's Fairplay DRM. Let's look at the alternatives:
Some book sellers won't want to protect their content, but obviously most of the content coming out of the big publishing companies needs to be protected, otherwise, those $15 bestsellers will instantly be iChatted everywhere on earth.
So there will be DRM of some sort, obviously.
Next, what kind of DRM will Apple use? Files are files folks and Apple already owns what is one of the most effective DRM encrytion methods ou