|Kai: Ninja of Fire|
|Publication date||September 1, 2011|
| Preceded by|
| Followed by|
Zane: Ninja of Ice
Book's official description
Masters of Spinjitzu: a new force to save the world!
Sensei Wu has gathered a powerful team of ninja warriors. Now he must train them in the ancient art of Spinjitzu. If he fails, Lord Garmadon and his evil skeleton warriors will destroy the land of Ninjago and all of its inhabitants.
But before Sensei Wu can teach the ninja to defeat their enemies, he must teach them to trust themselves. When Kai helps Zane, the Ninja of Ice, go in search of answers to the past, he finds something else . . . danger!