This volume, published in German in 1937, is an attempt to provide for the average intelligent person the information that every one ought to have. The book is divided into several parts, the first dealing with the sex function, the second with the technic of sex activity, the third with the hygiene of sex life, the fourth with the problems of fertility, the fifth with the disturbances of sex life, the sixth with the diseases of sex life, the seventh with prostitution, the eighth with the sex life of children, the ninth with the sex life of the unmarried and the tenth with the author's solution of the sex problem. The book is well written, is handsomely illustrated and is modern in its point of view. The author is firm for continence during premarital life, although recognizing that 95 per cent of people fail of complete continence. He recognizes that