John Kerr is the author of A Most Dangerous Method: The Story of Jung, Freud, &  Sabrina Spielrein, a historical study of psychoanalysis, recently made into a movie.  He trained as a clinical psychologist at New York University and has worked as a staff psychologist in diverse inpatient and outpatient settings.  In addition, for many years, he was the senior editor at The Analytic Press, a publisher of books for psychoanalysts and other mental health professionals.  He is the co-editor of Freud and the History of Psychoanalysis and of Attachment Theory: Social, Developmental, and Clinical Perspectives.  He is currently a member of the Rapaport-Klein Study Group, a visiting teacher at Harvard Medical School, and an honorary member of the William Alanson White Society of New York.  He is currently participating in research on early attachment while writing a play about the American psychiatrist, Harry Stack Sullivan.