Knuffle Bunny Too: A Case of Mistaken Identity is a children's picture book written and illustrated by Mo Willems. A sequel to Knuffle Bunny, it was released on September 4, 2007, by Hyperion Books and reached the number one spot on the New York Times Bestseller List for children's books. In 2009 Weston Woods Studios released an animated version of the book. It was directed by Karen Villarreal and is narrated by Mo, Cheryl, and Trixie Willems. Source: Wikipedia (en)