Kate Howard is the author of Scooby-Doo Mystery: Hotel of Horrors and LEGO: LEGO: The LEGO Movie Novel.
There's a new gang in Ninjago City -- the sons of Garmadon, named after Lloyd's dad. These crooks are tough, and they are determined to steal the famous Oni Masks. If they get all three masks, they could become all-powerful.
It's up to Lloyd and the ninja to catch those crooks! Can they protect the masks -- and Lloyd's dad's good name?