Ninjago Chapter Books Series by Greg Farshtey

Will Kai be the greatest warrior ever known? Maybe, if he ever listens to Sensei Wu long enough to complete his training. He's stubborn, he's reckless, and he might just save the world.

Masters of Spinjitzu: a new force to save the world!The next chapter book in the Ninjago series!Cole is the leader of the team. As the Earth Ninja, he is (perhaps unsurprisingly) the most grounded of the four. And the strongest. There is no physical challenge Cole cannot overcome. Now is his chance to use his skills to save the world!

Masters of Spinjitzu: a new force to save the world!The next book in the Lego Ninjago Chapter Book series!Jay is much like the element he represents: fast and full of energy. Always good in a fight, always up for a laugh, and always, always inventing. Even if those inventions don't always turn out the way he wants!