This is the second of a series of books on “How to Live”, by Dr. George F. Butler. These books range from childhood to old age. The boy and the girl, the young man and young woman, the young husband and young wife, middle-aged people, and old people are instructed in these books in matters of the utmost importance to their health and happiness. The first in this series was “Every Boy’s Book”. These two books are especially intended for boys and girls from ten to fourteen years of age, but every father and mother should read them, so they, too, can know the truth about these great sex facts, and be prepared to answer children’s questions—now sometimes troublesome.