Rating: 

brian d foy mentions in his introduction and appendix A that the path to mastery involves learning from many people… and to learn from brian is an advantage. Appendix A is a list of Further Reading and by following up on many of these compounds the effect of the book. You get the bang for your buck.

Chapter 3 on Secure Programming Techniques is helpful because it places the topic front and center. This topic should find its way downstream into Learning Perl to encourage secure programming as early as possible.

I found immediate value in the chapters on benchmarking, profiling (especially DBI profiling) and logging. The chapters on Cleaning Up Perl (chapter 7: perltidy and de-obfuscation) and Configuring Perl (chapter 11: dealing with switches) are a great recap of material critical for "creating professional programs with Perl".

PS – My personal route to mastering Perl had a required stop at "Programming the Perl DBI".