Artemis Fowl Series By Eoin Colfer.
Twelve-year-old Artemis Fowl is a millionaire, a genius, and above all, a criminal mastermind. But even Artemis doesn't know what he's taken on when he kidnaps a fairy, Captain Holly Short of the LEPrecon Unit. These aren't the fairies of bedtime stories—they're dangerous! Full of unexpected twists and turns, Artemis Fowl is a riveting, magical adventure.
Artemis Fowl wants to find his father, held hostage in Russia; Holly Short wants to find who’s supplying the goblins with human technology; Foaly wants to find out who’s disabled all the LEP Technology and pointed the finger at him. Artemis has received a ransom demand for his father but is captured by the LEP who suspect him of supplying the goblins with dangerous Human technology (batteries). He convinces them he’s innocent and agrees to help them if they help him free his father. Meanwhile, down in the underground world, chaos has arisen. An unknown traitor has stolen forbidden weapons and armed a horde of trolls, setting them loose to wreak havoc on the citizens. Clues lead Captain Holly Short straight to Artemis, and she exacts a small bit of revenge by kidnapping him, just as he once kidnapped her. But soon she learns that Artemis isn’t behind the chaos, and if she’s to have any hope of stopping it, she will need his help. As a result, these onetime adversaries must now join forces—a mix that proves to be both charming and volatile.
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...?
The evil pixie Opal Koboi has spent the last year in a self-induced coma, plotting her revenge on all those who foiled her attempt to destroy the LEPrecon fairy police. And Artemis Fowl is at the top of her list. After his last run-in with the fairies, Artemis had his mind wiped of his memories of the world belowground. But they have not forgotten about him. Once again, he must stop the human and fairy worlds from colliding—only this time, Artemis faces an enemy who may have finally outsmarted him.