Artemis Fowl and the Lost Colony

A second juvenile genius has discovered that fairies do exist, and she is determined to capture one for scientific study. And not just any fairy. The newcomer intends to trap a demon -- the most human-hating species unknown to man. Only an ancient time spell separates the demons from mankind -- and Artemis must prevent it from unravelling. If he fails, the bloodthirsty tribe will relaunch their quest to wipe every human from the planet.