This is a somewhat unusual book on mental hygiene. Intended primarily for nurses, it is simply written and suitable for the general reader. The writer assumes the attitude of a kindly and understanding adviser who attempts to explain the biologic bases of behavior and the nature of emotional disturbances; she offers "a guide for the perplexed." The latter part of the book is addressed specifically to nurses and reveals the author's particularly intimate knowledge of the problems of the student nurse in training. A spiritual quality based on religious feeling, a desire to offer a "philosophy of life" and a woman's outlook determine the peculiar character and atmosphere of the book. It is a good and readable general book on mental hygiene.