Nigel Eastman was Emeritus Professor of Law and Ethics in Psychiatry at St George's, University of London, UK and Honorary Consultant Forensic Psychiatrist, South West London & St George's Mental Health NHS Trust, UK. He died unexpectedly in February 2022, while this work was still in press. Prof. Eastman was a passionate and dedicated educator, and his publications are a testimony to that passion, and the culmination of a lifetime of study, clinical practice and research. This book would not exist without him and it is with both sadness and respect that we, his co- authors and editors, dedicate this book to him, as a posthumous thank you for the enthusiasm, intellect and generosity that made it possible. Gwen Adshead is a Consultant Forensic Psychiatrist and Psychotherapist at Broadmoor Hospital, West London NHS Trust, Southall, UK. Simone Fox is a Consultant Clinical and Forensic Psychologist at South London and Maudsley NHS Foundation Trust, UK. Richard Latham is a Consultant Forensic Psychiatrist at East London NHS Foundation Trust, UK. Seán Whyte is a Consultant Forensic Psychiatrist and Clinical Director at South-West London & St George's Mental Health NHS Trust, UK and a Visiting Senior Lecturer at the Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK. Hannah Kate Williams is a Specialty Registrar in Forensic Psychiatry & Medical Psychotherapy at South-West London & St George's Mental Health NHS Trust, UK.