Welcome to the world of Ninjago and the ninja Masters of Spinjitzu as they battle to protect their land from evil! Based on the successful toy-line and TV show, these books follow the adventures of Cole, Zane, Jay and Kai - four young ninja warriors and their Sensei Wu. Sensei Wu has trained Cole, Zane, Jay and Kai to be Masters of Spinjitzu, but when Samukai boasts he can defeat Sensei Wu and his ninja, Garmadon takes him up on his bet!