is a wonderful book and an invaluable reference, one of the best you can get if you're a Perl programmer; I consider it a must-have. The third edition's fairly old, though: it covers Perl up to version 5.6, and although the core language is fairly stable, there have of course been many changes and updates since then, so I'd really recommend getting the current (fourth) edition of the book instead. You may not be able to get it for one cent, but believe me, it'll be money well-spent.