Mac Barnett is the New York Times bestselling author of many picture books, including Extra Yarn, which won a Caldecott Honor, the Boston Globe-Horn Book Award, and the E.B. White Read Aloud Award. Mac lives in Oakland, California. Christian Robinson has illustrated several acclaimed picture books, including Josephine: The Dazzling Life of Josephine Baker, which received a Boston Globe-Horn Book Honor. He lives in San Francisco, California.