Dr. Pinner modestly states in his preface that this book is not a textbook and that the primary aim "is not to impart knowledge but to create understanding." None the less there is little of importance about pulmonary tuberculosis which is left unsaid in this interesting treatise by a man who has thought long and carefully on the subject. One of the valuable features is the thorough lists of references, which follow each chapter. The author uses the device of inserting after each title a short paragraph in which the substance of the article is abstracted. There are numerous excellent illustrations and indexes.