The Eternity Code

Artemis Fowl II, criminal mastermind aged 12 is off on another crazy encounter with fairies accompanied with his ever-faithful bodyguard Butler. In this adventure, Artemis builds a cube with stolen fairy technology. It is stolen by Jon Spiro, a Chicago business man who shoots and kills Butler.Holly Short, Captain of the LEP heals Butler with magic.

Unfortunately, the healing does not work as planned. It leaves Butler alive, though fifteen years older and unable to carry out his duties as a bodyguard. However, his sister, Juliet, agrees to help Fowl recover the stolen computer. With the aid of the rest of the LEPrecon team and kleptomaniac dwarf Mulch Diggums, they break into Spiro's company, Fission Chips, in the Spiro Needle. They begin their mission once Artemis is captured and placed inside the company.
Artemis lets Foaly take control of the C Cube and tricks Spiro into going to the offices of his rivals Phonetix in order to sabotage their work projects, but Artemis gets Spiro arrested by a SWAT team.

After recovering the C cube, Commander Julius Root orders Artemis Fowl, Butler, and Juliet mind-wiped before they cause anymore damage to the fairies.