I read the previous comments on the subject and these did not help.
When I try to synchronize one of my books, InDesign crashes. When I bring a different file to the book, it works fine. But that file is not part of the book. How can I figure out what the issue is?
I have a set of file that crash when the Cross-Reference Formats sync. Clear this option in the Synchronize Options, and Synchronize the book again. If it still crashes try clearing other options. In CS3 Graphic Styles crashed sometimes.
The workaround is to load styles and formats manually.