Continuity mistake: In the second Kingdom Keepers book Amanda is suddenly able to speak into Finn's ear as if he was wearing an earpiece.
Plot hole: In the first Kingdom Keepers book it is established that Wayne created the DHI's because only they can see the characters come to life. However, later on in the book the park visitors can see and follow Maleficent.
Continuity mistake: When the Kingdom Keepers are inside the It's A Small World attraction, and the puppets come to life, the book states that a doll locked onto Finn's arm, chomping down hard enough to draw blood. However, at the girl scout car wash, Finn shows Amanda his bite marks by lifting up the leg on his shorts.