Synopsis: Derek becomes a ninja-in-training in Book 6 of the bestselling My Life series by Janet TashjianDerek Fallon has expanded his taste in cartoons to the world of manga and anime. Together with his friends Carly, Matt, and Umberto, Derek has fun learning about all the cool aspects of ninja culture.When someone starts vandalizing their school with graffiti of a mischievous troll-like figure, these ninjas-in-training are convinced they'll be able to…