Robie H. Harris is the trusted and highly acclaimed author of numerous books for children, including the bestselling Let's Talk About Sex, Let's Talk About Where Babies Come From and Let's Talk About Girls, Boys, Babies, Bodies, Families and Friends, essential guides for children on bodies, babies, families and health. She is also the author of the first four books in the Let's Talk About YOU and ME series. She lives in New York City. Chris Chatterton is an author, animator, and the illustrator of There's a Bison Bouncing on the Bed! by Paul Bright and When Santa Came to Stay by Timothy Knapman. Chris Chatterton lives in Newcastle, England.