2Management of Mental Disorders, 5th Edition (MMD5) is an innovative book that provides practical guidance in recognizing and treating mental disorders. The fifth edition has been revised by experts and is a compilation of the best practices in mental health circa 2013. MMD5 outlines the steps required for proper assessment and focuses on how to implement the many effective treatments that are now available. This book also includes resource materials, such as outcome measures, worksheets, and information pamphlets for individuals with mental disorders and their families. MMD5 is designed to complement the skills of busy clinicians and for use as a textbook for undergraduate and graduate students. The design of the fifth edition-core assessment and clinical skills and sections on the internalizing, externalizing, psychotic, neurodevelopmental, and neurocognitive clusters of disorders-is based on papers prepared for the discussions of the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) and the International Classification of Diseases, 11th Edition (ICD-11) working groups. These papers presume that disorders within each of these five clusters share genetic risk factors, familiarity, specific environmental risk factors, neural substrates, biomarkers, temperamental antecedents, abnormalities of cognitive or emotional processing, symptom similarity, high rates of comorbidity, course of illness, and treatment response that differ in important ways from disorders within the other four clusters. The clusters are not intended to replace existing diagnostic criteria but rather are used to facilitate the identification of possible relationships between disorders in terms of the risk and clinical factors. The present edition is the first to make the five-cluster structure of mental disorders explicit. Management of Mental Disorders is a publication of the Clinical Research Unit for Anxiety and Depression (CRUfAD), University of New South Wales (UNSW) School of Psychiatry at St Vincent's Hospital, Sydney, Australia. CRUfAD has produced treatment protocols for 30 years, first for the Royal Australian and New Zealand College of Psychiatrists and then with the Division of Mental Health, World Health Organization, Geneva. Country specific versions of previous editions of the Management of Mental Disorders were produced for New Zealand, Canada, the United Kingdom, China, and Italy. This fifth edition is published in both printed and electronic form.