The latest version of Books is now available for download:

http://books.aetherial.net/downloads/Books_3.0a13.tbz

This release fixes some embarassang performance-related bugs in
addition to some other bug fixes. No new functionality has been
added, but the existing app should be quite a bit faster for those of
you using lists with hundreds of items in it. I Highly recommend that
everyone install this update.

-Chris