I agree it's a great book to have, but it actually explains a lot less than the articles I listed above or the talk I gave at YAPC::NA this year. In particular, it does not sufficiently address some of the shortcomings and pitfalls of inside-out objects. It's certainly not where I would suggest anyone go to learn about inside-out objects, though it has increased awareness and sent people to places like Perl Monks in search of details.
-xdg
Code written by xdg and posted on PerlMonks is public domain. It is provided as is with no warranties, express or implied, of any kind. Posted code may not have been tested. Use of posted code is at your own risk.