Every once and a while, this message pops up in iBooks. “Failed to load book because the requested resource is missing.“. What’s this crap mean, and how do you fix it?

Well it means that something got screwy with iBooks. Most likely you had a book open running in the background, and iOS 4.0 needed the extra memory so it closed iBooks and then something screwed up.

The solution? It’s real simple. Load up the library, open another book, go back to the library and open the book that was refusing to open.

Problem solved.

Peace, JbB