Hmm, let's see:

Perl related:

• Programming Perl, 3rd Ed.
• Perl Cookbook, 2nd Ed.
• Mastering Regular Expressions, 2nd Ed.
• Mastering Perl/Tk
• Object-Oriented Perl
• Higher-Order Perl
• Extending and Embedding Perl

Besides those Perl books I have books like "Introduction to Algorithms", "The Pragmatic Programmer", "Programming Ruby", "Code Complete" within easy reach.

Arjen