Continuity mistake: This is seen over two books: Artemis Fowl and Artemis Fowl: The Eternity Code. In Artemis Fowl, Chapter 2, Artemis cracked his knuckles when he was trying to decode the fairy Book. However, in Artemis Fowl: The Eternity Code, Chapter 1, Jon Spiro cracked his knuckles, and it is stated that Artemis detests that habit.

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