Joe Oliver, PhD, is a consultant clinical psychologist and joint director of the cognitive behavioral therapy (CBT) for psychosis postgraduate diploma program at University College London. He also works within a North London National Health Service Trust, developing training and delivering interventions for people with psychosis. He is founder of Contextual Consulting, a London-based consultancy offering acceptance and commitment therapy (ACT)-focused training, supervision, and psychological therapy. Joe is an Association for Contextual Behavioral Science (ACBS) peer-reviewed ACT trainer, and regularly delivers ACT teaching and training in the UK and internationally. He is coeditor of Acceptance and Commitment Therapy and Mindfulness for Psychosis, and coauthor of ACTivate Your Life and Acceptance and Commitment Therapy.Richard Bennett, ClinPsyD, works as a clinical psychologist and cognitive behavioral psychotherapist. He lectures at the Centre for Applied Psychology at the University of Birmingham, where he leads the postgraduate diploma program in CBT. He worked in adult and forensic mental health services in the National Health Service for over twenty years before setting up Think Psychology, an independent psychology practice offering therapy, supervision, and training. Richard is an active member of ACBS and the British Association of Behavioural and Cognitive Psychotherapies (BABCP). He is recognized as a BABCP-accredited psychotherapist, supervisor, and trainer; and an ACBS peer-reviewed ACT trainer. He coedited Rational Emotive Behavior Therapy in Sport and Exercise, and is coauthor of Acceptance and Commitment Therapy.Russ Harris is an internationally acclaimed acceptance and commitment therapy (ACT) trainer and author of the best-selling ACT-based self-help book The Happiness Trap, which has sold over 600,000 copies and been published in thirty languages. He is widely renowned for his ability to teach ACT in a way that is simple, clear, and fun-yet extrem