Although written primarily for patients, this book should be read by physicians everywhere. The first chapter consists of a brief but excellent history of the development of our knowledge of tuberculosis. This is followed by several chapters dealing primarily with the tubercle bacillus. What this organism is, how it infects the body, how the body defends itself and the incidence of infection in various parts of the world are clearly presented. The classification of tuberculous lesions is discussed and illustrated by numerous drawings. Under the subject of diagnosis the author gives the tuberculin test the first place. This is followed by x-ray film inspection of the chest. This is then followed by the various steps necessary to determine whether an x-ray shadow represents tuberculosis or some other disease. Several chapters are devoted to treatment, in which the author discusses such subjects as the general care of the patients, sanatorium vs.