Dame Hilary Margaret Wykes is an English academic, author and editor. She is Professor of Clinical Psychology and Rehabilitation at King's College London, Director of the NIHR Clinical Research Network: Mental Health, and President and Secretary of Schizophrenia International Research Society. Nicholas Tarrier is Professor of Clinical Psychology, Head of the Division of Clinical Psychology and Research Director of the School of Psychological Sciences, University of Manchester, UK, and Honorary Consultant Clinical Psychologist in the Manchester Mental Health and Social Care NHS Trust. He has held academic posts at universities in Brazil and Australia.He has a long-standing interest in the practice and evaluation of Cognitive-Behaviour Therapy and its application to a wide range of disorders. Shôn Lewis is the editor of Outcome and Innovation in Psychological Treatment of Schizophrenia, published by Wiley.