Robert Langs is a practising psychoanalyst, Visiting Professor of Psychiatry at Mount Sinai School of Medicine, New York and Honorary Visiting Fellow of Regents College, London. He is the author of over 40 books, including a full-length play entitled Freud's Birds of Prey, and some 150 papers on psychotherapy and related topics in which the quest for a science of psychotherapy and its integration with other sciences has taken a prominent place.