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 , named a Publishers Weekly Best Children's Book of the Year. He is also the author and illustrator of The Rock from the Sky and The Skull as well as the illustrator of Extra Yarn , Sam and Dave Dig a Hole , Triangle , Square , and Circle , all by Mac Barnett. Originally from Niagara Falls, Ontario, Jon Klassen now lives in Los Angeles.