Artemis is in Spain waiting for someone to show up. Sounds normal but when it arrives screaming starts. The visitor is a daemon the 8th family of fairy.
Meanwhile the fairies have noticed what happened. They send their best agent captain Holly Short ( sorry I have forgot to mention the name before) to investigate.
Sounds routine yes?
Well next thing they know a demon has been fairy-napped, a maniac is trying to kill all the demons and Artemis is stuck on the demon's home.
This is the last Artemis Fowl book so far. I really enjoyed the series.