"After another big fight with Lord Garmadon, the ninja have come together to rebuild the Monastery of Spinjitzu and train with Master Wu. But when a training exercise [goes] wrong unleashes a group of angry Invisible Ninja Squirrels--that's right, angry Invisible Ninja Squirrels--the ninja will have to think fast or risk destroying the monastery all over again!"--Back cover.
year: 2020
call number/section: 1000
subjects: ninja, juvenile fiction, lego toys, squirrels, training, good and evil, adventure stories, fiction, adventure and adventurers, adventure fiction, action and adventure fiction, readers (publications)