This twentieth year edition aims to provide a brief yet comprehensive account of the psychiatry disorders and their allied aspects in a user-friendly and easy to follow manner. Extensively revised and updated along with excellent presentation of mental diseases. The chapter on psychiatry history and examination now contains a resume of the important laboratory investigations in psychiatry, in addition to other changes. The hallmark of this book is clarity and brevity. In short, a concise text of psychiatry presenting in a simple, lucid form and easily digestible language. The text has been aligned to the most recent developments in classification, terminology and treatment methods.