MICHELLE KNUDSEN is a New York Times- bestselling author of more than 45 books for young readers, including board books, picture books, early readers, and middle grade and young adult novels. Her best-known publication to date is the award-winning picture book Library Lion , which has been translated into more than ten languages and was selected by Time magazine as one of the 100 Best Children's Books of All Time. She is also the author of the young adult novel Evil Librarian , which was awarded the 2015 Sid Fleischman Award for Humor. Knudsen lives in Brooklyn, New York. CHRISTOPHER SANTORO has been illustrating children's books for over 30 years. His titles include Open the Barn Door , Open the Garage Door , and It's Haunted! He has been honored by the Society of Illustrators, the American Institute of Graphic Arts, the American Library Association, and The New Yorker.