The fourth book in the brilliant Death Force series plunges the elite squad of hardened mercenaries into a deadly battle for survival in the frozen wastelands of the Arctic. A plane carrying a Russian oil billionaire has crashed mysteriously in the Arctic in the middle of a brutal winter. Nobody knows why, nor can they locate the aircraft's black box. With only days left before the signal switches itself off, the men from 'Death Force' are hired by a rival billionaire to make one last desperate bid to find the black box. But when they finally locate the plane, they also uncover a deadly secret. This was no ordinary crash. There's a reason why the black box went missing. And soon they find themselves on the run for their lives, battling an unseen enemy, across the world's most terrifying landscape.