Christopher Eliopoulos is the author/illustrator of The Yawns Are Coming! and The Giggles Are Coming! and the illustrator of the New York Times bestselling Ordinary People Change the World series of picture book biographies. He began his illustration career as a letterer for Marvel and has worked on thousands of comics, including his own Cosmic Commandos and Monster Mayhem graphic novels. He lives in New Jersey with his wife and their identical twin sons (when the boys are home from college).