The Brotherhood (The Brotherhood #5)

Found by Scotland Yard scratched into the cargo area of a hovercraft bound from Dover to Calais: "Help me. My name is Malon Reeves. I've been kidnapped by a group of terrorist mutants calling themselves the Brotherhood. Don't know how many of them there are, but I know that they've killed a few of my father's guards. Don't know how much time has passed, but it seems like forever since I've eaten. If this note is found, alert the authorities. My father is a very wealthy man and he'll see to your reward should I be found. Please, hurry. I don't think they intend for me to live."