Charles E. Schaefer, Ph.D., is professor of psychology at Fairleigh Dickinson University, Hackensack, New Jersey. Dr. Schaefer is the co-founder and director emeritus of the Association for Play Therapy, a national organization that includes international membership. He is a fellow of the American Psychological Association. Among Dr. Schaefer's forty-five books are the outstanding Handbook of Play Therapy and The Therapeutic Use of Child's Play, both of which have become classics in the field. He maintains a private psychotherapy practice with children and their families in Hackensack, New Jersey. Donna M. Cangelosi, Psy. D., is a licensed psychologist and registered play therapist supervisor who maintains a private practice with children, adolescents, and adults in Upper Montclair, New Jersey, where she provides psychotherapy, clinical supervision, and parent education. She is co-editor of Play Therapy Techniques, Vol. 1, and The Playing Cure, and author of Saying Goodbye in Child Psychotherapy, as well as several chapters dealing with psychodynamic play therapy. Dr. Cangelosi is a member of the American Psychological Association and the Association for Play Therapy.