Evil pixie, Opal Koboi is back and shes more dangerous than ever. This time she doesnt just want power over the fairy People, this time she wants the lot. Everyone is under threat - humans and fairies alike. Captain Holly Short is the only fairy with a hope of stopping her, but as Holly knows, it takes one genius criminal mastermind to fight another. And the 14-year-old genius Holly is thinking of cant even remember that fairies exist. How is she going to convince Artemis Fowl to help her?