Abstract: When the only way to save his mother's life lies with the lemurs he made extinct five years ago, Artemis turns to his fairy friends to take him back in time, where he tries to undo the damage while avoiding his dangerous younger self.

Abstract: Ten millennia ago, the fairy People were defeated in a great battle with mankind, forcing them to move underground. Only the eighth family of fairies remained undefeated: the demons. But now one demon has discovered the secrets of the fairy world, and if humans get hold of this information the fairies are in BIG trouble. Only one person can prevent this disaster – teenage criminal mastermind Artemis Fowl.