The book is about a young genious that had his arm torn off in and incident and he had mad himself a brand new biomechanical arm, he uses his arm to fight bad guys and stop desasters but mostly to save people, he has two other friends, an amutee girl with no legs, and a blind kid. if you have anything els to add on i woud be happy to know. If you would like some changes to the story let me know as well.