Grrrrrlpower! After a bullying incident at school, Mary Leary's young heroine joins a karate class. But karate, she learns, is not simply a method of self-defense. It also helps develop confidence and concentration. "To be sure enough of oneself to avoid a fight that is what karate is about," her teacher, the sensei, tells her. So begins a firsthand look at what being a karate student is really like, from the special uniform and classroom to the rigorous...