Okay, I found a reason for the "Wolves of the Calla" problem! Yaaaaaay!! On Freedom Scientific's website, they discuss the bug-fixes and enhancements for OpenBook version 7.02, due out this month sometime. The one of interest is as follows: . OpenBook can now open entire books if they are exceptionally long. Sounds like our Calla catastrophe to me. Eureka! Now, the odd thing is that Game of Thrones by George R.R. Martin is about as long as "Wolves" if not a bit longer, and it opened without problems, at least as far as I could tell. The book seems to have the right amount of pages. So it must not be a hard and fast bug. But at least now I know what happened.