When a bus driver takes a break from his route, a very unlikely volunteer springs up to take his place.

Mo Willems, a number one "New York Times "best-selling author and illustrator, has been awarded a Caldecott Honor on three occasions (for "Don't Let the Pigeon Drive the Bus!," "Knuffle Bunny: A Cautionary Tale," and "Knuffle Bunny Too: A Case of Mistaken Identity"). His celebrated Elephant & Piggie series has received two Theodor Seuss Geisel Medals. Other favorites include "El conejito Knuffle: un cuento aleccionador," "Naked Mole Rat Gets Dressed "and "Big Frog Can't Fit In: A Pop-Out Book."
Mo began his career on "Sesame Street," where he garnered six Emmy Awards. He lives with his family in Massachusetts.