The Virals are put to the ultimate test when they find a geocache containing an ornate puzzle box. Shelton decodes the cipher inside, only to find more tantalizing clues left by "The Gamemaster." A second, greater geocache is within reach--if the Virals are up to the challenge. But the hunt takes a dark turn when Tory locates the other box--a fake bomb, along with a sinister proposal from The Gamemaster. Now, the real game has begun: another bomb...

"The First Special Service Force is an elite commando unit composed of American and Canadian troops. From the start, the Force is intended to go where other soldiers won't. The call for volunteers specifically singles out lumberjacks, hunters, prospectors, and game wardens as ideal candidates. And their training is anything but basic, including intense lessons in parachuting, hand-to-hand combat, skiing, rock climbing, and adaptation to cold climates....