Night Without End by Alistair MacLean

From the acclaimed master of action and suspense. The all time classic. 400 miles north of the Arctic Circle, an airliner crashes in the polar ice-cap.

In temperatures 40 degrees below zero, six men and four women survive. For the members of a remote scientific research station who rescue them, there are some sinister questions to answer – the first one being, who shot the pilot before the crash? Then, with communications cut and supplies running low, the station doctor must lead the survivors on a desperate bid to reach the coast, knowing all the while that there is a ruthless enemy in their midst, someone working to accomplish their destruction.