Heidi Gerard Kaduson, PhD, RPT-S, specializes in evaluation and intervention services for children with a variety of behavioral, emotional, and learning problems. She is past president of the Association for Play Therapy and Director of The Play Therapy Training Institute in Monroe Township, New Jersey. She has lectured internationally on play therapy, attention-deficit/hyperactivity disorder, and learning disabilities. Dr. Kaduson's coedited books include Prescriptive Play Therapy and Short-Term Play Therapy, Third Edition. She maintains a private practice in child psychotherapy in Monroe Township.

Donna Cangelosi, PsyD, RPT-S, maintains a private practice with children, adolescents, and adults in Wayne, New Jersey, where she provides psychotherapy, clinical supervision, and parent education. Dr. Cangelosi is coauthor of Essential Play Therapy Techniques and coeditor of Prescriptive Play Therapy, and she has published several chapters and professional articles on the theory and application of psychodynamic play therapy. She has lectured throughout the country on topics related to play therapy and loss issues in children.

Charles E. Schaefer, PhD, RPT-S, until his death in 2020, was Professor Emeritus of Clinical Psychology at Fairleigh Dickinson University. A pioneering play therapist, he was Cofounder and Director Emeritus of the Association for Play Therapy, which recognized him with its Lifetime Achievement Award. Dr. Schaefer published more than 100 research articles and over 70 professional books, including Prescriptive Play Therapy; Play-Based Interventions for Childhood Anxieties, Fears, and Phobias; and Essential Play Therapy Techniques.