If you are an experienced programmer or one who is starting this book is for you. It is written by two of the greatest gurus of this language (Randal Schwartz and Brain de Foy).
Perl has been for many years my favorite language for its versatility, the large number of modules that exist on CPAN, being multiplatform and its power to filter data.
This book will give you all the tools to help you master the language and make the most.
In this book you can learn some of the most difficult themes in Perl: hashes, regular expressions but also you can learn the basics to make a program in the Perl's way.
Enjoy Learning Perl!