Knuffle Bunny: A Cautionary Tale (from Dutch knuffel, pronounced k-nuffle) is a classic children's picture book written and illustrated by Mo Willems. Released by Hyperion Books in 2004, Knuffle Bunny received the 2005 Caldecott Honor. The story spawned an animated short film and a musical play, as well as two sequels. The Knuffle Bunny Series has sold more than 750,000 copies. The series' protagonist, Trixie, is named after Willems's real-life child. Source: Wikipedia (en)