Perl 5 Internals
by Simon Cozens
Publisher: NetThink 2001
This is a three-hour course which provides a hands-on introduction to how the perl interpreter works internally, how to go about testing and fixing bugs in the interpreter, and what the internals are likely to look like in the future of Perl, Perl 6.
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by Mark Jason Dominus - Morgan Kaufmann
Perl incorporates many advanced features that are not well understood and are rarely used by most Perl programmers, but they are very powerful. One of these techniques is writing functions that manufacture or modify other functions.
by Shishir Gundavaram - O'Reilly
A text for expert programmers, it focuses on the CGI specification down to the details. The book explains what CGI does, describes all CGI methods and environment variables, explains how to port Usenet news to the Web with CGI and more.
This books describes and explains Perl (Practical Extraction and Report Language), a scripting language that is usually interpreted and is noted for its extensive use of regular expressions and a large module archive CPAN.
by Johan Vromans, Linda Mui - O'Reilly
This quick reference provides a complete overview of the Perl programming language. The book covers a summary of Perl syntax rules and a complete list of operators, built-in functions, and standard library modules, all with brief descriptions.