The public, mental health consumers, as well as mental health practitioners wonder about what kinds of values mental health professionals hold, and what kinds of values influence psychiatric diagnosis. Are mental disorders socio-political, practical, or scientific concepts? Is psychiatric diagnosis value-neutral? What role does the fundamental philosophical question \“How should I live?\” play in mental health care? In his carefully nuanced and exhaustively referenced monograph, psychiatrist and philosopher of psychiatry John Z. Sadler describes the manifold kinds of values and value judgements involved in psychiatric diagnosis and classification systems like the DSM. Professor Sadler takes the reader on a fascinating conceptual tour of the inner workings of psychiatric diagnosis, considering the role of science, culture, sexuality, politics, gender, technology, human nature, patienthood, and professions in building his vision of a more humane psychiatric diagnostic\nprocess.