Mac Barnett is a New York Times bestselling author whose books have been translated into more than thirty languages. His picture books include two Caldecott Honor–winning collaborations with Jon Klassen: Sam & Dave Dig a Hole and Extra Yarn. Among his other popular books are I Love You Like a Pig, illustrated by Greg Pizzoli, and The Magic Word, illustrated by Elise Parsley. He lives in Oakland, California. You can visit him online at macbarnett.com.

Shawn Harris’s first illustrated book, Her Right Foot by Dave Eggers, received seven starred reviews, was an Orbis Pictus Award Honor Book, an ALA Notable, and a PW Best Book of the Year. His other picture books include Eggers's What Can a Citizen Do, which was a Time Magazine Best Children’s Book, Everyone’s Awake by Colin Meloy, A Polar Bear in the Snow by Mac Barnett, and his own author-illustrated works Have You Ever Seen a Flower? and Doing Business. Harris also occasionally moonlights as singer-songwriter of the popular Oakland, California, band the Matches, whose early 2000s album art sparked his illustration career.