The Care and Keeping of You 2: The Body Book for Older Girls - The sequel to the beloved bestseller "The Care and Keeping of You." This edition provides more in-depth information on girls' physical and emotional development.
The Boy's Body Book: Everything You Need to Know for Growing Up YOU. I think this is pretty much on par with American Girl's guide for girls (The Care and Keeping of You). Discusses basic hygiene, physical changes, dealing with peer pressure, etc.