Sigma Force

Carved into a moving island of ice twice the size of the United States, Ice Station Grendel has been abandoned for more than seventy years. The twisted brainchild of the finest minds of the former Soviet Union, it was designed to be inaccessible and virtually invisible.

But an American undersea research vessel has inadvertently pulled too close – and something has been sighted moving inside the allegedly deserted facility, something whose survival defies every natural law. And now, as scientists, soldiers, intelligence operatives, and unsuspecting civilians are drawn into Grendel’s lethal vortex, the most extreme measures possible will be undertaken to protect its dark mysteries – because the terrible truths locked behind submerged walls of ice and steel could end human life on Earth.

The Rand scientific expedition entered the lush wilderness of the Amazon and never returned. Years later, one of its members has stumbled out of the world’s most inhospitable rainforest: a former Special Forces soldier – scarred, mutilated, terrified, and mere hours from death – who went in with one arm missing…and came out with both intact.

Unable to comprehend this inexplicable event, the government sends Nathan Rand into this impenetrable secret world of undreamed – of perils to follow the trail of his vanished father…toward mysteries that must be solved at any cost. But the nightmare that is awaiting Nate and his team of scientists and seasoned U.S. Army Rangers dwarfs any danger they anticipated…an ancient, unspoken terror – a power beyond human imagining-that can forever alter the world beyond the dark, lethal confines of the Amazon rainforest for better… and for worse.