Jon Klassen is the creator of the #1 New York Times best-selling I Want My Hat Back, which won a Theodor Seuss Geisel Honor, and its companions This Is Not My Hat, which won a Caldecott Medal and a Kate Greenaway Medal, and We Found a Hat. He is also the author-illustrator of The Rock from the Sky and The Skull, and the illustrator of Extra Yarn, Sam and Dave Dig a Hole, and the Shapes Trilogy, all by Mac Barnett. Originally from Ontario, Jon Klassen now lives in Los Angeles.