Curveball: The Year I Lost My Grip is a book written by Jordan Sonnenblick. It's the story of Peter Friedman and the year after he injures his elbow so badly that he will never be able to really pitch on his baseball team again, the same year that his grandfather attains Alzheimer's disease. His best friend AJ, still a star baseball player himself, keeps reminding Peter of his loss. The one bright spot is his new cute girlfriend Angelika and the gift of his grandfather's photography equipment.