Way of the Ninja - Farshtey, Greg, and West, Tracey

The son of a blacksmith, Kai's only dream is to master his father's craft. Until the day an army of skeleton warriors raids his villages and kidnaps his sister, Nya. Kai's only hope of rescuing his sister lies with Sensei Wu, a mysterious old man with a mission. Sensei Wu promises to teach Kai Spinjitzu. Will it be enough to save Nya? ...

Way of the Ninja 2012, Scholastic Inc.

ISBN-13: 9780545401135

Trade paperback