Levi can't believe his ears when his new stepsister, Sofia, insists that karate isn't a real sport. But he's even more shocked when Sofia suddenly joins his karate school. Why is she there? And why can't she be more respectful toward Levi and his friends? Soon, the sparring between the new siblings turns into an outright competition, until Sofia tries to break a board and has a breakdown instead. Can Levi put aside his feelings to figure out what's at the heart of their karate clash? Find out in this exciting, easy-to-read Sport Stories chapter book!