Mac Barnett is a New York Times Bestselling author of children's books. He is a rising star in the literary industry and the program director of 826 LA, a non-profit organization dedicated to supporting students with their creative and expository writing skills. Mac's books have won many prizes and have sold over three million copies worldwide. He is well—known for his popular series including The Terrible Two, Jack Book Series, and the Kid Spy Series. Barnett's other popular books include A Polar Bear in the Snow, Triangle, Extra Yarn, and The Three Billy Goats Gruff.