Kolymsky Heights. A Siberian permafrost hell lost in endless night, the perfect setting for an underground Russian research station. One so secret it doesn't officially exist. Once there, scientists cannot leave. But someone has got a message out to the West - a message summoning the only man alive capable of achieving the impossible.'One of the most powerful thrillers I have ever read'Michael James, The Times'A breathless story of fear and courage' Daily Telegraph'A tremendous thriller' Observer