Nicole Nadeauis a child psychiatrist and the consultant for many Caillou books and television shows. She is the author of "Caillou: The Babysitter," "Caillou: I'm Not Hungry! ," "Caillou Says No! ," and "Caillou Wakes Up at Night." Pierre Brignaud is the illustrator of "Caillou: I Will Always Love You," "Caillou: Just Like Daddy," "Caillou Moves Around," and "Caillou: Potty Time." They both live in Montreal, Quebec.