With the assistance of a number of well qualified experts, Dr. O'Brien has provided in this volume a much needed guide-book for parents in explaining the facts of life to the young. The point of view of educators and psychiatrists is employed, but the volume is practical rather than theoretical. Very specific and valuable suggestions are given for the guidance of parents in instructing children at various age levels. The volume very definitely places the responsibility for this educational procedure upon the home and opposes including sex instruction in the curriculum of the school. The whole discussion is carried on as a phase of character education and in accordance with the principles of religion. No religious bias.