Artemis Fowl: The Eternity Code by Eoin Colfer

Artemis finds himself in trouble once again - no thanks to his evil scheming. His genius knows no bounds when he figures out a way to create a mini computer far more advanced than human technology based on his exposure to fairy technology. When a business deal - to sell off the computer - where he supposedly has the upper hand goes wrong, Artemis finds his life in peril and must race to save Butler's life and protect the secret of the existence of fairies. To do this he must call the fairies for help but at what cost?

As usual Artemis Fowl is fast-paced, unpredictable and thoroughly entertaining. Be intrigued as you enter the world (and mind) of this boy genius. And... try not to sit on the edge of your seat... though that may be quite impossible.