'If this book is not of interest, the reader has no business being a psychiatrist. … The book is well written and provides an excellent and accessible overview of relevant research. … This book provides a wealth of useful, clinically relevant information that will be of interest to any reader who accepts the importance of taking account of a patient's illness beyond simple allocation to an operational diagnostic category. All psychiatrists involved in the management of individuals with mood and psychotic illnesses should read this book.' British Journal of Psychiatry