This book consists of a series of letters written by a prominent urologist to his father, who was suffering from prostatic obstruction. The book reminds one of a somewhat similar series of letters written by a self-made businessman to his son. There are seven letters, and they present in simple language the subject of prostatic obstruction, including cancer. They follow the usual textbook order of anatomy, physiology, etiology, symptoms, diagnosis and treatment. One letter is devoted to transurethral resections, and another to cancer of the prostate. The material is clearly presented and gives a fine picture of the present day status of the treatment of cancer of the prostate. This book will answer many questions that might arise in the mind of the patient with prostatic obstruction.