Counterforce

STRIKE
Deep in the Pacific Ocean, inside the cramped hull of the world's most advanced submarine, a man holds a list of targets. Each one is withing the United States; each one will mean millions of casualities … and a world thrown into nuclear chaos.
COUNTERSTRIKE
Now America's elite anti-sub warriors are using every modern device at their disposal in their desperate hunt for the rogue submarine, Vulkan. But Captain Michael Cooksey, Commander of the U.S.S. Triton, knows that his elusive prey … equipped with the most sophisticated weaponry ever designed by man … can be brought down only by the most ancient weapon of all: betrayal.
Someone within the Russian hierarchy is about to give the Americans the one tool they need to stop the Vulkan. Time is running out. And for an unsuspecting world, it may already be too late…