Sara Pennypacker is a New York Times' bestselling author of children's books including Clementine, The Talented Clementine, Clementine's Letter, Clementine: Friend of the Week, The Amazing World of Stuart, including Stuart's Cape and Stuart goes to School, Flat Stanley books including The Mount Rushmore Calamity, The Great Egyptian Grave Robbery, The Japanese Ninja Surprise and The Intrepid Canadian Expedition, Sparrow Girl, and Pierre in Love.