The author of this book reviews the historical, experimental, and clinical evidence for the use of enzymes in diagnosis and treatment. He discusses the effects of proteolytic enzymes on suppurative and non-suppurative inflammation, the fibrinolytic phenomenon, methods of administration, clinical indications and contraindications, enzyme inhibitors, the diagnostic use of enzymes, and possible future developments. This new and rapidly developing field has long deserved a book bringing its many aspects together under one cover. The author is to be congratulated on a notable beginning. An extensive list of references is included at the end of the volume along with an index which seems to have been compiled hurriedly. It is hoped that subsequent editions, and there will surely be revisions, will give a little more care to the compilation of this important feature. The book is illustrated with appropriate photographs, some of which are in color.