Adam Crabtree is a psychotherapist in private practice, specializing in dissociative identity disorder and other dissociative disorders. He is on the faculty of the Centre for Training in Psychotherapy. His study of the origins of dynamic psychiatry and psychology is titled:
From Mesmer to Freud: Magnetic Sleep and the Roots of Psychological Healing. He is author of writings in the areas of the history of psychotherapy, hypnosis and psychical research, as well as papers on William James and Charles Sanders Peirce. He wrote Multiple Man: Explorations in Possession and Multiple Personality, Trance Zero: The Psychology of Maximum Experience and is a contributing author of Irreducible Mind: Toward A Psychology for the 21st Century.
He has called for a reconsideration and redefinition of hypnosis as a species of trance and has just completed a book manuscript with that
theme: Memoir of a Trance Therapist: A Biographical History of an Idea. In his book Evolutionary Love and the Ravages of Greed, he has written of the need for a revaluation of human morality in terms of a revised understanding of the nature of of love. Most recently, in The Land of Hypnagogia, he has called for a revisioning of the nature of therapeutic healing in terms of the exploration of human depth.