John P. Forsyth, PhD, is an internationally renowned author and speaker in the fields of acceptance and commitment therapy (ACT), mindfulness practices, and self-development and growth. For over twenty years, his writings, teachings, and research have focused on developing ACT and mindfulness practices to alleviate human suffering, awaken the human spirit, and nurture psychological health and vitality. His personal journey and experience, balanced with practical insights grounded in scientific evidence, offers hope to those wishing to find a path out of suffering and into wholeness. He has coauthored several popular ACT books, including Acceptance and Commitment Therapy for Anxiety Disorders for mental health professionals, and three self-help books for the public: The Mindfulness and Acceptance Workbook for Anxiety, ACT on Life Not on Anger, and Your Life on Purpose.

Forsyth regularly gives inspirational talks and practical workshops to the public and professionals in the United States and abroad, and offers ACT trainings at the Omega Institute for Holistic Studies in Rhinebeck, NY, where he serves as a member of the teaching faculty. He is known to infuse his teaching and trainings with energy, humility, and compassion, and his down-to-earth workshops are consistently praised for their clarity, depth, and utility. Collectively, Forsyth's work has helped foster growing interest in acceptance and mindfulness in psychology, mental health, medicine, and society.

Georg H. Eifert, PhD, is an internationally recognized author, scientist, speaker, and trainer in the use of acceptance and commitment therapy (ACT), an integrative approach balancing mindful acceptance, change, and compassion to foster psychological health and wellness. He is also professor emeritus of psychology at Chapman University in Orange County, CA, where he was previously department chair and associate dean of health sciences. He has won numerous awards for his research, teaching, and writing contributions. He is also a licensed clinical psychologist. As an active developer, researcher, and practitioner of ACT and transcendental meditation (TM), Eifert is coauthor of several popular books, including the highly praised practitioner's treatment guide, Acceptance and Commitment Therapy for Anxiety Disorders, as well as several ACT books for the public: ACT on Life Not on Anger, Your Life on Purpose, and The Anorexia Workbook. He has also authored and coauthored several books in German.

Eifert regularly gives workshops and talks around the world, teaching ACT to both the public and professionals to help people end psychological suffering and lead more fulfilling lives. His workshops have been praised as inspiring, humorous, and empowering, and are renowned for their authenticity, clarity, and practical usefulness.