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.

In reply to Intermediate Perl by targetsmart

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