The epic climax to the ever-popular supernatural trilogy from Alex Rider's number one bestselling novelist. After fleeing Hong Kong, the five gatekeepers - Matt, Pedro, Scott, Jamie, and Scarlett - find themselves in a hostile and deadly environment. The wicked King of the Old Ones rallies his armies in Oblivion, a bleak region where humanity's last survivors must fight the ultimate war, as they strive to re-group and prepare their next move.