The Eternity Code (Artemis Fowl #3) by Eoin Colder
Thirteen-year-old criminal mastermind Artemis Fowl has constructed a supercomputer from stolen fairy technology. In the wrong hands it could be fatal for humans and fairies alike. But no need to worry, Artemis has a brilliant plan. He's not going to use the computer; he's just going to show it to a ruthless American businessman with Mafia connections. His bodyguard, Butler, will be with him. What could possibly go wrong...?
Dog Gone note: This book is in excellent condition. However, it does have a bar code sticker on the back cover lower right. Slight sharp mark at out side top of book.