Joanna Cole is the author of the popular Magic School Bus series, I'm a Big Brother, I'm a Big Sister, and many other award-winning books. In Asking About Sex & Growing Up, she provides a reassuring blend of practical guidance and scientific fact for the audience that needs it most. Margaret Miller is a freelance photographer who lives in New York city with her husband and two children. She is the author-photographers of many popular books for children, and the photographer for Ramona: Behind the Scenes of a Television Show, My Puppy Is born, and other books.