Christopher Eliopoulos began his illustration career at Marvel Comics, and has worked on thousands of comics, including Cosmic Commandos and Monster Mayhem. He is the author/illustrator of the picture books The Yawns Are Coming!, The Giggles Are Coming and A Little Emotional! He is also the illustrator of the Ordinary People Change the World children’s book series. He is a co-creator and executive producer of Xavier Riddle and the Secret Museum on PBSKids.