Your grandparents are werewolves

"It is a full moon tonight and that means YOU finally get to become a werewolf! Mom and Dad have to attend the Monster Council meeting tonight so they are leaving you with Grandma and Grandpa, or as you like to call them, Gram-wolf and Gramp-wolf. On this very special night, YOU get to decide what you want to do! Do you join Grandpa at the Werewolf School for the special talent show OR do you go with Grandma to look for the ancient tooth of the First Werewolf? Whatever you decide, it will surely be a night you will never forget!"--Back cover.