This book has been regarded widely as an outstanding practical textbook on urology since the first edition was printed, 24 years ago. The author of the first two editions, the late Prof. Hans Wildbolz, was regarded as one of the greatest European urologists. The present edition is edited by his able son, who has retained the same general arrangement and classification of subjects present in previous editions and has continued the same sound discussion of the various lesions. This book does not attempt a detailed discussion of the various urologic fields as is found in that complete treatise on diseases of the genitourinary tract, the "Handbuch der Urologie" edited by Von Lichtenberg, Voelcker, and Wildbolz. Most of the references to other authors are confined to European authorities; in fact, many of the contributions made in recent years by American urologists are conspicuous by their absence or are only briefly considered.