In the sequel to The Book of Monsters, Monstrox is now a stormy thundercloud (the wicked sorcerer can take many evil forms) and is on a mission to destroy Knighton! Join Monstrox and find out about his awesome evil plan and what it takes to become an evil genius. Don't miss the chance to continue the journey into the exciting land of the Nexo Knights! The book comes with an exclusive scannable shield to help readers access greater power within the Nexo Knights app.