Showing I Was an Eighth-Grade Ninja by Andrew Simmons

Winner of the Moonbeam Award Bronze Medal for comics and graphic novels! Martial Arts Moves Aren t Just for Practice Anymore. Hana, a Japanese orphan, is used to working on her martial-arts skills. After she moves to California to live with her grandfather, the only place she really feels at home is in his martial-arts studio. But all that practice will come in handy when savage creatures from another world attack! In the blink of an eye, Hana realizes she has a lot to learn about herself, her grandfather, and his strange little pet."