I'm sorry to hear that your expectations for the book were not met, but honestly it was never targeted at someone with your skill level and understanding of penetration testing. Perhaps if I explained why I wrote the book, it would provide some rationale for its existence.
As a university professor teaching Information System Security at the undergraduate and graduate level to students migrating into the security field, I have had numerous students interested and confused as to how to actually conduct a penetration test. These people came from multiple disciplines and backgrounds and needed a way to understand the process. This book is not intended for an audience with a strong technical background in hacking - it is intended for engineers interested in understanding the business side of penetration testing; it is intended for managers trying to understand what they might experience when confronted with an audit, and eventual pentest; it is intended for those who want to become professional penetration testers, but are either just starting out in the field, or committing to a career change from a different part of the IT world.
I believe this book fills a void in the current literature - there are many outstanding books dedicated to tools and advanced hacks, but few that can introduce novices to the field in a way that is understandable, manageable, and yet challenging. The book has an additional feature that was not addressed in your review - the DVD, which contains three LiveCDs that provide an excellent learning experience for novices and experts alike. The book walks the reader part-way through an easier LiveCD setup, but the more advanced LiveCD is definitely a challenge for all.
Again, I am sorry to hear that the book was not to your liking; I still believe that the book offers the intended audience substantial value.