Artemis Fowl and The Opal Deception

Child genius Artemis Fowl is in terrible danger he just can't remember why Opal koboi is back, and the power-crazed pixie wants revenge. Her to-do list: - frame Holly short for murder - start a war between fairies and humans - kill anyone who's ever annoyed her (yes, this includes Artemis) but knowledge of the fairies has been erased from artemis's mind, and when you don't believe your arch-enemy exists, it can be quite tricky to defeat them. It's unfortunate that artemis's only hope is a farting dwarf. Enter mulch diggums...