My Little Pony: Ponyville Mysteries: The Tail of the Timberwolf by "Penumbra Quill" (collective pen name of Michael Vogel and Nicole Dubuc) is the twenty-sixth book in a series of chapter books published by Little, Brown and Company and the second entry in the "Ponyville Mysteries" series. In this book, the Cutie Mark Crusaders and their new friend Lilymoon try to solve a mystery surrounding a candy-eating Timberwolf.