Here is a summary of the key events in Artemis Fowl: The Eternity Code by Eoin Colfer:
Artemis Fowl has discovered the secret world of the fairies and is using his knowledge and criminal skills to blackmail them. In this second book, Artemis steals the secret fairy C Cube, which contains all fairy information and codes. He plans to use it to gain more power and wealth.
Captain Holly Short of the LEPrecon unit is sent to steal it back. She encounters Artemis, who has also stolen advanced fairy technology. They are both pursued by the criminal mastermind Jon Spiro. During their battle of wits, Artemis and