It is a tutorial, not a comprehensive manual; you may need other resources for deep API lookups.
While it covers using third-party modules, it only introduces a handful of the most common ones. Is It Right For You? Learning Perl Making Easy Things Easy and Hard ...
It focuses on the most common tasks, teaching you how to write single-file programs of roughly 1 to 128 lines , which authors claim account for 90% of Perl programs in use. It is a tutorial, not a comprehensive manual;
The book is structured based on an introductory Perl course. It is designed to be completed in roughly 30 to 45 hours or a week’s worth of work. It is a tutorial