The fourth edition of this standard monograph on impotence is much enlarged and contains many facts that have been brought out since the third edition was published. The author considers impotence as a symptom and discusses thoroughly its etiology, pathology, symptomatology and treatment. There is an exhaustive chapter on prophylaxis, and finally a review is given of all known methods of treating impotence. These are thoroughly discussed, and the experience of the author with each of these methods is reported. Any physician who will spend the time to read Dr. Vecki's book will learn a great deal about this common, complex and obscure symptom, impotence.