[ Boutell 96] Boutell, Thomas. CGI Programming in C and Perl.
[Guelich+ 00] Guelich, Scott, Shishir Gundavaram, Gunther Birznieks, and Linda Mui. CGI Programming with Perl, Second Edition.
[Meltzer+ 01] Meltzer, Kevin, and Brent Michalski. Writing CGI Applications with Perl.
[Stein 97] Stein, Lincoln D. How to Set Up and Maintain a Web Site, Second Edition. One of the best books written about creating and maintaining a web site.
[ Stein 98] Stein, Lincoln. Official Guide to Programming with CGI.pm. The title says it all.
The Idiot's Guide to Solving Perl CGI Problems: www.perl.com/pub/doc/FAQs/cgi/idiotsguidel Not only for idiots; full of useful information and gotchas.
Perl CGI FAQ: www.perl.com/pub/doc/FAQs/cgi/perl-cgi-faql A must-read for all new CGI programmers.
The WWW Security FAQ: www.w3.org/Security/Faq/ Details about writing secure web programs.