Saw this review on Amazon.com:
"This book is based a false premise. The author notes correctly that many people use "niceness" as a means to manipulate others, and that people using a veneer of niceness to manipulate others often end up hurting themselves and their loved ones. The author is even correct in the diagnosis that the cure for this problem is learning to be true to yourself.
Unfortunately, the book carries the thesis that the problem is in being nice. This is his false premise. The real problem is that people who use kindness to manipulate others are manipulative. The problems that the author faced in his life and that he sees in many of his clients is that they are extremely manipulative.
The minor thesis of and major promise of the book is that, if a nice guy stops being "nice" to others, he will get more sex, and learn to bend others to his will. The unfortunate implication of this minor thesis is that it just turns the client from one type of manipulator into another.
The book is an extremely quick and easy read in pop-psychology genre. The main words of wisdom are to be true to yourself. I was dismayed to see the work fortifying the belief that all human kindness is just a way to manipulate others, and that we need to always question the motivation of others. Sometimes kindness is just kindness.
The book tries to label niceness as a disease needing a cure. This makes for a catchy title and a niche in the pop psychology market, but what little wisdom the author has to share is twisted in the works poor logic, I really couldn't give the book more than a two."