Artemis Fowl: The Eternity Code by Eoin Colfer

Thirteen‑year‑old genius and anti‑hero Artemis Fowl has built the ultimate supercomputer — the C Cube — using stolen fairy technology. When ruthless businessman Jon Spiro steals it and nearly kills Artemis’s bodyguard Butler, Artemis must team up with fairies, including Captain Holly Short and centaur tech‑expert Foaly, to rescue the Cube and save his friend.

 Packed with cunning plans, high‑stakes heists, and a blend of magic and advanced tech, this third entry in the series deepens Artemis’s evolution and features tense alliances and daring rescues.