Mac Barnett is the New York Times bestselling author of more than forty books, including Sam and Dave Dig a Hole, Extra Yarn, and the Mac B., Kid Spy series. His books have won numerous prizes, including three E. B. White Read-Aloud Awards, two Caldecott Honors, and the Boston Globe-Horn Book Award. Mac lives in Oakland, California.

Greg Pizzoli is an author, illustrator, and printmaker. His first picture book, The Watermelon Seed, won the Theodor Seuss Geisel Award, and his book Good Night Owl was a Geisel Honor. His Viking nonfiction picture book Tricky Vic was a New York Times Best Illustrated of 2015. He lives in Philadelphia.