Recognizing a need for puberty education books for younger children, award-winning author Lynda Madaras published Ready, Set, Grow!: A "What's Happening to My Body?" Book for Younger Girls in 2003 to widespread acclaim. Now, in her uniquely straightforward, warm, and funny style, Madaras introduces On Your Mark, Get Set, Grow!: A "What's Happening to My Body?" Book for Younger Boys.

Responding to real-life questions and concerns from younger boys about their changing bodies, Madaras covers a wide range of topics at a reading and understanding level that's just right for them: the growth of sex organs, body hair, and facial hair; weight and height spurts; the unwelcome appearance of acne and body odor; shaving; circumcision; erections and ejaculation; feelings about puberty; and bullying.