If you are going to be doing a lot of development work you might also want to consider getting a membership in ASPN Perl, its initial cost appears high ~$495, but it offers you online searchable access to nine of the O'Reilly Books (Cookbook, Progamming, Learning, Advanced, etc). It also gives you a license to use the Komodo editor, which is a nice editor that was designed for Perl code from the start and offers a built in visual debugger.

Komodo Review