This volume offers a concise introduction to the multifaceted phenomenon of hypnosis and its clinical application. The neurobiological foundations of hypnotic trance as an altered state of consciousness are explained, along with indications and empirical evidence of effectiveness. It also discusses the similarities and differences with stage hypnosis, as well as the associated risks of the method. Numerous case studies illustrate the mechanisms of hypnosis as a therapeutic form in a quasi ego-free state. The book provides easily understandable information about everything one should know about hypnosis as a therapeutic method, which has also proven to be an effective complement to other approaches.