A boy is excluded from joining his friends' pet club because of his unusual pet.

Ben selects from the shelter a most unusual "dog" that wreaks havoc in town until she has a chance to prove her worth.

"In a world built for Perfect Pets, Barnabus is a Failed Project, half mouse, half elephant, kept out of sight until his dreams of freedom lead him and his misfit friends on a perilous adventure. A stunning picture book from international bestsellers The Fan Brothers, joined by their brother Devin Fan."--