This is a derivative work with script added that builds on the psychological research of others. That approach can be beneficial, as long as you color between the lines.
Lieberman promises you the moon. "This book contains only specific psychological tactics governing human behavior that will let you outsmart, outthink, and out maneuver . . . anyone, any place, anytime." After reading the book, I beg to differ. No book, and not this one, can do that much.
If you are familiar with neuro-linguistic programming, Tony Robbins' work, and Robert Cialdini's work (Influence), you will find almost nothing new here.
As usual, I watched closely to see what Lieberman would have to say about manipulation. His strongest argument is that everyone wants to help everyone else, and you are just making it easier for them to help you. Hmmm! Are you persuaded? If you are, rate the book a little higher.
I thought several of the scripts were flawed, but many were quite good. The main problem related to being manipulative. But each of us has our own standards. If you are an unethical person looking to take advantage of someone, the methods in this book would often work all right for you.
Frankly, I prefer the more balanced approach of Stephen Covey and Robert Cialdini in addressing when and where psychological tools can and should be used.
The book is well done for what it is. If you don't share my concern about manipulation, be sure to read it. If you fear being manipulated, then be doubly sure to read it. Someone is bound to use these scripts on you at some time or other. Reading the book will be a good vaccine. Then you can resist what is truly not in your favor.