I may be the odd man out here, but I don't own any perl books. ... Actually, I do own a tattered copy of the pink Camel but I doubt it's really relevant except as a historical reference ;-) Mostly, I just use the documentation that comes with perl.

However, I have the following at work for the other programmer types in the office (and I occasionally look something up):

• Learning Perl 3
• Mastering Regular Expressions 1
• Advanced Perl Programming
• Object Oriented Perl

Oh! I just remembered. I have review copies of the first "Perl Cookbook" and "Programming the Perl DBI" somewhere too.