The major goal of this classic 4th edition title is to provide the busy clinician, psychiatric resident and medical and graduate students with the most up-to-date information on the etiology, diagnosis and treatment of psychiatric disorders. Toward that goal, all chapters have been updated and new topics have been added. Recent changes to the Diagnostic and Statistical Manual 5 are addressed in chapters where necessary and, additionally, details about several new medications introduced since 2008 have been included. In this updated and expanded edition, the reader is provided with the most contemporary information in psychiatric research and treatment and the literature cited is supported by a close survey of the field. The new edition of this indispensable title, with its continued focus on the biologic and medical aspects of psychiatry, will continue to be of significant help to all interested in the scientific practice of psychiatry.