They determine Angeline is suffering from Spelltropy, a fairy disease that is spread through the use of magic, and can only be cured by the brain fluid of the silky sifaka lemur of Madagascar.

Unfortunately, the lemur is extinct, due to a ruthless deal Artemis made almost 8 years ago with a group called the Extinctionists.

Artemis assures Holly that the past Butler will quietly slip the lemur into the room (to avoid Angeline seeing it) and that they will simply be able to leave.

After following his younger self to an animal park to retrieve the lemur, Artemis breaks into the wrong cage and is attacked by a gorilla, and Holly is forced into action.

They commandeer a shuttle and fly it to Fez, Morocco, where the younger Artemis will trade the lemur to the Extinctionists for a hundred thousand euros.

There he discovers that the "flames" are holograms, and meets his old nemesis Opal Koboi, who has put the mesmer on the leader of the Extinctionists to help her collect rare species for her research.

She also reveals that she caused the resembling symptoms to Spelltropy and made the whole incident herself (she dropped out of the time stream 2 days early and took control).

In the ensuing chase, Opal exhibits the astonishing strength she has won in her research on endangered animals, pulverizing entire sections of the plane with her fists, and eventually forcing Artemis to crash land on the coastline, breaking his collarbone in the process.

[4] Stuart Kelly commented, "Why Harry Potter became a phenomenon while Artemis Fowl only remains a huge sensation is a conundrum for future ages to ponder... Colfer doesn't handle time-travel, he revels in it.

"[5] VOYA remarked, "Colfer delivers another great story filled with action, drama, and clever plot twists that will please new readers as well as series fans.

This combination of ingenious plot and authentic characters who evolve over time is a pleasure to read and leaves readers begging for more.

"[6] There is also a special limited paperback edition including the short story "LEPrecon," originally published in The Artemis Fowl Files.