For over 100 years, the kingdom of Knighton was a peaceful place-until The Book of Monsters escaped from its prison. Stuffed to the spine with page after page of the most fearsome monsters imaginable, The Book of Monsters fights the Nexo Knights team by summoning bad guys from within. Look inside to learn all about the vile villains who threaten Knighton and about the valiant Nexo Knights who fight to stop them! Part guide book, part artifact, this is the real-life Book of Monsters-the archenemy of the Nexo Knights team!