I live and breathe with the Perl CD Bookshelf
which contains Perl in a Nutshell, Mastering Regular Expressions, Learning Perl, Programming Perl, Learning Perl Objects and the Perl Cookbook digitally (and searchable, too) wrapped up with a paperback version of Perl in a Nutshell.
(Version 3 was better for me, with the XML titles; YMMV.)
The only problem with the Perl CD Bookshelf is that newer versions don't include the Mastering Perl/Tk book on the CD anymore. I was going to upgrade mine until I noticed that. If they've added it back in again I'd upgrade in a heartbeat.
Revolution. Today, 3 O'Clock. Meet behind the monkey bars.
I would love to change the world, but they won't give me the source code