Lieve Bruyninx is the owner of Factor Psy, a mental health care training institute. She is a psychologist and peerreviewed ACT trainer with 20 years of behaviour therapy expertise.

Yvonne BarnesHolmes is the CöFounder of Perspectives Ireland and CöDeveloper of ProcessBased Behaviour Therapy (PBBT). She has 25 years of experience in behaviour therapy.

Ciara McEnteggart is the CöFounder of Perspectives Ireland and CöDeveloper of ProcessBased Behaviour Therapy (PBBT). She has 15 years of experience in behaviour therapy.

Marjolein Vleugel has been working as a Healthcare Psychologist for more than 20 years. She is the founder and head trainer of Expertise Centrum ACT.

Roy Thewissen, PhD, is a clinical psychologist and behavioural therapist. He works as a freelancer and in the pain department at Adelante rehabilitation clinic in the Netherlands.

Foreword: Standing at the cradle of art and science Introduction 1 What you need to know about connecting the heart of ACT with the head of ACT 2 Identifying and understanding client stories: Exploring selfascontent 3 Understanding and weakening fusion through defusion interventions 4 Creative hopelessness and why it is so central in ACT 5 Learning to stay in the hereandnow 6 Acceptance and willingness to embrace discomfort 7 Letting go of your story and taking control of your life from selfascontext 8 Valuesoriented action from selfascontext 9 Finally