Child genius Artemis Fowl is in serious danger—he just can’t remember why. Opal Koboi is back, and her revenge plan is in full swing: frame Holly Short, start a fairy-human war, and eliminate anyone who’s ever crossed her… including Artemis.
But with no memory of the fairy world, Artemis has no idea what he’s up against. His only hope? A flatulent dwarf named Mulch Diggums. (Book 4)