"The best thriller I've ever read." (Philip Pullman). Kolymsky Heights. A Siberian permafrost hell lost in endless nights, the perfect setting for an underground Russian research station. It's a place so secret it doesn't officially exist; once there, the scientists are forbidden to leave. But one scientist is desperate to get a message to the outside world. So desperate, he sends a plea across the wildness to the West in order to summon the one man alive capable of achieving the impossible..."Sensationally good. Cleverly conceived and brilliantly executed. One of the great thrillers of the last century." (Charles Cumming).