perl

If you have read the famous "Llama Book" (Learning Perl by O'Reilly) and need a book to show you more advanced features, I highly recommend reading this book next.

This book provides a introduction many advanced topics in Perl Programming, such as referencing, eval, Object-Oriented Programming and so on. The topics are quite varied and the chapters are brief and not too verbose. I really think this format is helpful for new Perl Programmers, especially those without a strong programming background, who aren't familiar with these concepts.

I really like the author's easy-going, no-nonsense style. He will tell you how something works without too much technical terminology, and also will admit when another language is better suited for something.

Readers who find Larry Wall's "Programming Perl" book difficult to understand will find this book refreshing. It provides a good introduction to advanced topics, and if the reader is interested they can read more detailed books such as the afore-mentioned "Programming Perl". This book is a definitely must-read for intermediate Perl Programmers.

This is one of the four critical books you need to learn Perl; Programming Perl, Learning Perl, Perl Cookbook and Advanced Perl Programming. This book provides a deep understanding of how references (pointers) can be used to increase performance. In addition the book gives you a deeper understanding about how to make better use of hash tables as data structures. The section on code generation using templates is great as well.

This is a great book.

If you want to excel in PERL programming, this is a great text.

It is written in a clear, detailed manner.