In the village of Konohagakure, school is literally a battlefield where classmates are ninjas in training competing to become the greatest ninja in the land.

Illustrations and simple, rhyming text reveal a young ninja who uses his special moves to sneak up on the family dog, take a cookie from his brother, and escape Granny's kisses, but before day is done he meets his match.

Kai's sister, Nya, is kidnapped and he must learn Spinjitzu from Sensei Wu, a mysterious old man, to rescue her.

When Lord Garmadon uses his mega weapon to turn back the clock and bring an ancient monster back to life, the Ninjago try to stop him, but end up being turned into children instead.

Zane is ridiculed by the other ninjas Cole, Jay, and Kai, for dressing and acting strangely, but when Zane leads them into a mission that ends in the destruction of Sensei Wu's monastery, Zane must try to make things right.

In an epic quest to save Lloyd, the Ninja will travel to uncharted lands, meet new allies and gain powerful weapons, unlock unknown powers, all while battling the supernatural Cursed Spirits in an effort to stop a monstrous deity from cursing all of Ninjago.

When the Overlord returns, transforming into the powerful Golden Master, it's up to ninja Cole, Jay, Kai, Zane, and Lloyd to defeat him.

"Ever since Lord Garmadon retreated to the underworld, peace has spread throughout the land of Ninjago. But now there is a new threat -- Lloyd Garmadon, Lord Garmadon's son! At first, Cole, Jay, Kai, and Zane don't take Lloyd seriously. After all his main goal is stealing candy from villagers. But all that changes when Lloyd accidentally awakens the Serpentine, a race of powerful snake-headed beasts who've been banished for centuries. Can the four...

"Late at night, when all is quiet and everyone is asleep, a ninja creeps silently through the house in search of treasure."--

Tori, Shane, and Dustin lead typical teenage lives in Blue Bay Harbor but they have one thing in common; they are students at a secret ninja school under the teachings of a wise sensei. Their world changes when Lothor, a ninja master banished to space for his evil deeds, returns to Earth bent on revenge.