MAC BARNETT is the New York Times bestselling author of many picture books, including the New York Times bestseller The Three Billy Goats Gruff; The Wolf, the Duck, and the Mouse; the Caldecott Honor Book and E. B. White Read Aloud Award winner Sam and Dave Dig a Hole; the Shapes Trilogy (Triangle, Circle, and Square); and the Caldecott Honor Book and Boston Globe-Horn Book Award winner Extra Yarn. Mac is also the author of the middle-grade series, Mac B., Kid Spy. He lives in Oakland, California.

CARSON ELLIS is the author and illustrator of the bestselling picture books Home and Du Iz Tak?, a Caldecott Honor book and the recipient of an E. B. White Read Aloud Award. She has illustrated a number of children's books, including What Is Love? by Mac Barnett, The Shortest Day by Susan Cooper, The Mysterious Benedict Society by Trenton Lee Stewart, The Composer Is Dead by Lemony Snicket, and the Wildwood Chronicles series by her husband, Colin Meloy. She lives on a farm with her family in Oregon.