nysus, perldoc is useful enough, but personally I couldn't do without the Camel Book. I also find the Perl CD Bookshelf (old version) exceptionally useful, because it has a combined HTML index of the Camel Book, Perl in a Nutshell (which you also get on paper) the Cookbook, Advanced Perl Programming and Learning Perl - and most things are covered in more than one of these books, so there's always a couple of *different* explanations immediately to hand. Highly recommended.

andy.