This book is not a "how to" manual, but rather a concise overview of many different aspects of hypnosis. It indeed deals with the "essentials" that any practicing hypnotist should know. Even though these are "essentials", they are not covered in any traditional hypnosis training, so anyone attending hypnosis training may benefit from this information.
The information in this book has a wide scope, but it is offered in a concise form - a like a review of essential points.
Some of the areas covered are misconceptions of hypnosis, contexts of hypnosis, human suggestibility, conscious and unconscious processing, susceptibility to hypnosis, physiological and psychological characteristics of hypnotic state, physical and environmental variables for doing hypnosis, structuring suggestions, patterns of hypnotic communication, suggestibility tests, formal hypnotic inductions, naturalistic hypnotic inductions, hypnotic phenomena, self-hypnosis, therapeutic utilization of hypnosis, sample trance scripts, ethical guidelines and much more.