The book provides all the relevant information to understand the mental illness through psychopathology, global clinical manifestations and clinical patterns. It equips the reader with the basic knowledge to identify psychiatric conditions occurring alone or in the context of other medical illnesses, to distinguish health psychology and psychiatry, and to know what to do, how to do it, and how to communicate with the patient and to cooperate with the psychiatrist. The core chapters are dedicated to mental disorders diagnosed according to the DSM V, and are organized in sub-chapters with key feature boxes and schemes that will allow the global comprehension of the mental disorder and its clinical management. The work includes also a general chapter on psychopathology and one on psychopharmacology presenting the practical information about suggested doses, side effects, drug interactions and warnings for the main psychotropics. The final chapter deals with forensic and legal aspects.