Item Description: by Randal L. Schwartz (Author), Tom Phoenix (Author), brian d foy (Author) ,
Publisher: O'Reilly Media, Inc.; 2nd edition (March 8, 2006)

Review Synopsis:

Who should be interested in this book?
If you would want to go from being a Perl dabbler to a Perl programmer. Intermediate Perl will teach you how to use Perl as a programming language not just a scripting language.
- from the back cover of this O'reilly book.
More informations can be seen here
Personally I recommend this book to those readers, who would want to continue learning Perl after reading the 'learning perl' book. To me all the topics were helpful, maintains a good tutorial-istic approach, The chapter about 'testing' serves a good introduction to testing Perl modules.