Artemis Fowl and the Lost Colony, Paperback/Eoin Colfer

Has criminal mastermind Artemis Fowl met his match? Until recently Artemis Fowl was the only human to have discovered that fairies do exist. But now a second juvenile genius wants to capture one for scientific study - and not just any old fairy. The newcomer intends to trap a demon, the most human-hating species unknown to man.