As part of an on-going study into Behavioural Science, I purchased this book to add to the numerous texts that I own. To be honest, I was disappointed.
Althought the general format of the book is wonderful, the content leaves a lot to be desired. I found it to be (for the most part) inaccurate guesswork. It illustrates different aspects of facial features and what they would mean. Most of these you could likely guess - dark rings under the eyes or eye-puffs would suggest to me that someone was tired or down. I tried practical tests on people I knew to see if the content was accurate, but I would say a fair 60% was not.
Summing up... spend your money on other ways to read people. There are much better books on the market than this. If on the other hand, you want to see nicely drawn sketches then this is the book for you!