Jason Luoma, Ph.D., is a clinical psychologist, director of the Portland Psychotherapy Clinic, Research, and Training Center in Portland, Oregon, and a grant-funded researcher with the University of Nevada, Reno. His research focuses on the application of ACT to the alleviation of burnout in counselors, ACT as an intervention for the stigma of substance abuse, and the dissemination and training of evidence-based therapies. He also has an active clinical practice and is an experienced trainer in Acceptance and Commitment Therapy. This book is the result of this practical experience and research.

Steven C. Hayes, Ph.D., is University of Nevada Foundation Professor of Psychology at the University of Nevada, Reno. He has authored nearly 400 articles and book chapters, and more than 30 books, including "Get Out of Your Mind and Into Your Life," "Acceptance and Commitment Therapy," and "Relational Frame Theory." A past president of the Association for Behavioral and Cognitive Therapies, he has conducted hundreds of trainings in ACT around the world and supervised the clinical training of scores of graduate students.

Robyn D. Walser, Ph.D., is a clinical psychologist who works as a consultant, ACT workshop presenter, and therapist in her private business, TLConsultation Services. She has been doing ACT workshop trainings, both nationally and internationally, since 1998, training in multiple formats and for multiple client problems. She also works at the National Center for PTSD at the Veterans Affairs Palo Alto Health Care System.. Dr. Walser has expertise in traumatic stress and has authored a number of articles and a book, "Acceptance and Commitment Therapy for the Treatment of Post-Traumatic Stress Disorder and Trauma Related Problems," for use of ACT in treating PTSD and trauma related problems.