Gillian Butler is a Fellow of the British Psychological Society and a Founding Fellow of the Academy of Cognitive Therapy. She works as a consultant clinical psychologist for the NHS and for Oxford Cognitive Therapy Centre. She has a special clinical interest in the use of CBT during recovery from traumatic experiences in childhood and runs training workshops on a wide variety of topics relevant to practitioners of CBT, in this country and overseas. Tony Hope is a psychiatrist and also Professor of Medical Ethics at the University of Oxford. He divides his time between clinical work, research, teaching and writing. His clinical interests focus particularly on the use of cognitive techniques both to overcome difficulties and to increase happiness. His other books include Medical Ethics: A very Short Introduction also published by Oxford.