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 Curtis 'Ovid' Poe - Wrox
This book introduces Perl to both new programmers and experienced ones. It presents step-by-step guidance in getting started, a host of try-it-out exercises, real-world examples, and everything necessary for a Perl novice to start with confidence.
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.
by Jonathan S. Duff, et al.
This book is primarily for people who want to learn Perl 6. It teaches the basics from a Perl 6 perspective, touching on variable interpolation, datastructure use, object construction, threads, closures, symbol tables, and other core features.
by Geoffrey Sampson - BookBoon
Contents: Introduction; Getting started; Data types; Operators; Branches; Program layout; Built-in functions; Loops; Reading from a file; Pattern matching; Writing to a file; Arrays; Lists; Scalar versus list context; Two-dimensional tables; etc.