Perl & LWP: Fetching Web Pages, Parsing HTML, Writing Spiders & More

Perl and XML: XML Processing with Perl

Programming Web Services with Perl

Programming the Perl DBI: Database programming with Perl

Learning Perl: Making Easy Things Easy and Hard Things Possible

Intermediate Perl: Beyond The Basics of Learning Perl

Automating System Administration with Perl: Tools to Make You More Efficient

Spidering Hacks

CGI Programming with Perl: Creating Dynamic Web Pages

Perl Cookbook, Second Edition

Network Programming with Perl