The Deception Detection guidebook is not intended to provide a thorough explanation of the various concepts involved in Statement Analysis, Body Language, or Deception Detection. This handbook is intended to be used as a reference for supervisors, Law Enforcement Officers, or other deception detectors to quickly refresh or review the various concepts. This guide is not written in a chapter format, but seeks to provide a quick overview of the various concepts/topics and to provide the reader with the gist of the information. It is meant to be a small handy guidebook that can fit in one’s pocket; giving access to the desired information without the need to sift through long case studies or filibustered material in order to review/recall the basic principles.
Overall this book is basically what it said it was- a pocket guide to deception detection. There is a lot of good information in here and most of it won't be anything knew to people who already have much experience in reading people who are potential liars. I myself have almost two decades of experience due to my current and past employments, and I would certainly not classify myself as an expert in the field (because there is much to learn in the various subtle methods that deceivers use), but like everything, the more exposure and practice one gets, the better they become (usually). I will state that had I had this book early in my careers, and was reviewing and applying it in the field, it think it would have been a great help.