Intermediate Perl: Beyond The Basics of Learning Perl, Edition 2

Programming Perl: Unmatched power for text processing and scripting, Edition 4

Learning Perl Objects, References, and Modules

Perl Pocket Reference: Programming Tools, Edition 5

Mastering Perl: Creating Professional Programs with Perl, Edition 2

Learning Perl 6: Keeping the Easy, Hard, and Impossible Within Reach

Perl for Oracle DBAs: Perl Scripts, Applications & Tips for Database Administrators