Books on sex tend too often to be religious, sensational, or coldly scientific; the author of this book is to be congratulated in that he falls into none of these categories. He has tried to establish real values and to point the way to a new approach to sexual morality. It is a book crammed full of facts suitable for any intelligent reader. Over-simplification detracts from its value to some extent, and this is specially the case when he discusses sublimation (page 41). It is very questionable whether masturbation should be included in the section 'The Deviations from the Normal'.