In this fascinating book, the authors apply psychoanalytic ego psychology to the interpretation of data gained in an extensive research project on hypnosis. They re-examine their basic frame of reference, clarify some of its assumptions, and thereby make a genuine contribution not only to the understanding of the variety of hypnotic phenomena but also to the nature of regression. Among other subjects, the book covers: dreams and hypnosis; fugues, multiple personalities, and hypnosis; the psychoanalytic theory of regression; the structure of the ego and its subsystems; and transference and hypnosis. The authors discuss the use of hypnosis as an adjunct in exploratory psychotherapy and the relation of hypnosis to sleep and somnambulism. Also described is the psychology of the hypnotist and the autonomy of psychic functioning.