ROBIE H. HARRIS began her career as a teacher at the Bank Street College of Education's School for Children. She started writing books for children in the 1970s and has numerous titles to her credit. Among them are the award-winning and internationally acclaimed books about sexual health for older children: IT'S SO AMAZING! A BOOK ABOUT EGGS, SPERM, BIRTH, BABIES, AND FAMILIES for children age seven and up and IT'S PERFECTLY NORMAL: CHANGING BODIES, GROWING UP, SEX, AND SEXUAL HEALTH for children age ten and up, which won her the National Family Planning and Reproductive Health Association Award for Outstanding Educator. She is also the well-known author of HAPPY BIRTH DAY!, HI NEW BABY!, and three picture books in the Growing Up series, all illustrated by Michael Emberley, as well as GOODBYE MOUSIE, illustrated by Jan Ormerod, and DON'T FORGET TO COME BACK!, illustrated by Harry Bliss. MICHAEL EMBERLEY is a graduate of the Rhode Island School of Design. He is the illustrator of many books for children, including several collaborations with Robie H. Harris: IT'S SO AMAZING, IT'S PERFECTLY NORMAL, HAPPY BIRTH DAY!, HI NEW BABY!, and three picture books in the Growing Up series, books that tell stories and facts about the first five years of life.