Mac Barnett is the author of several award-winning books for children, including President Taft Is Stuck in the Bath, illustrated by Chris Van Dusen, and Extra Yarn, illustrated by Jon Klassen, which won a Boston Globe–Horn Book Award and a Caldecott Honor. Mac Barnett lives in California.

Jon Klassen is the author-illustrator of I Want My Hat Back, a Theodor Seuss Geisel Honor book, and This Is Not My Hat, winner of the Caldecott Medal. He is also the illustrator of House Held Up by Trees, written by Ted Kooser, which was named a New York Times Book Review Best Illustrated Children’s Book, and Extra Yarn, written by Mac Barnett, which won a Caldecott Honor. Originally from Niagara Falls, Ontario, Jon Klassen now lives in Los Angeles.