From Eoin Colfer comes the fifth installment of the blockbuster Artemis Fowl series. Ten thousand years ago, humans and fairies fought a great battle for the magical island of Ireland. When it became clear to the fairy families that they could never win, they decided to move their civilization underground and keep themselves hidden from the humans. All the fairy families agreed on this, except the eighth family, the demons. The tainted time spell that has kept the demons at bay for so long is deteriorating, and demons are being flung back to earth. Only Artemis Fowl is smart enough to predict their return...or so he thinks. But there is another mysterious party who has managed to solve when the demons will appear. Can he and Captain Holly Short save the day before it's too late?