The use of a widely accepted diagnostic classification is vital for the effective treatment of psychiatric patients, and is essential in research.This pocket-book version of Chapter V of the 10th revision of the International Classification of Diseases and Related Health Problems (ICD-10) will facilitate both practice and research. It provides a quickly accessible and easy-to-use source of information about the new classification. The book has been compiled with a range of users in mind, including psychiatrists of all grades of seniority and experience, researchers, medical records staff and data analysts. Managers and other non-medically qualified mental health professionals will also find it useful. Compiled by a psychiatrist, this pocket-book is practical and clinical in its approach, and brings together in one place all major aspects of the description and diagnosis of psychiatric disorders.