Back in Action!

Back in Action! is a Ninjago: Masters of Spinjitzu book released in 2020. It takes place prior to March of the Oni.
==Synopsis==
The Monastery of Spinjitzu is in the process of being rebuilt, with the Ninja continuing to train while workers make repairs. A blindfolded training exercise results in a mishap, and the group are interrupted by Dareth. The would-be Ninja accidentally smashed open a glass case. As Wu grimly reveals, the case contained Invisible Ninja Squirrels-six of them, to be precise.
Using their magical ability to turn ordinary acorns into exploding “Shurike-nuts”, the squirrels begin to demolish the half-rebuilt monastery. At Lloyd’s suggestion, the Ninja attempt to locate the squirrels by sound. Using various methods from Nindroid senses to Elemental powers, they manage to locate and capture the rodents. Wu then returns with a new case for the squirrels. To be finished