Wolf Winter by Clare Francis

On a secret mission to the Finnish-Soviet border at the height of the Cold War, two Norwegian volunteers are shot dead. Their blood-stained bodies are found in the snow, inexplicably on the wrong side of the border, in an incident with far-reaching international repercussions.
   For the adventurer and mountaineer Halward Starheim, an adviser on the mission, the death of his friends is both a personal and a professional tragedy.
He retires to the seclusion of his island farm, haunted by the suspicion that his friends were betrayed. Starheim's search for answers draws him back into the past, to the brutal years of Nazi occupation, and into the present-day activities of a growing Lapp Rights movement. Swept from the treacherous intrigues of Olso to the frozen wastes of Arctic Lapland, he discovers at last that it is someone close to him who holds the key: maybe the lovely Ragna, widow of one of the dead men, or maybe the playboy journalist Rolf Berg, his mysterious wartime comrade and friend. In a breathtaking chase through the ice-mountains, in the storms and bitter cold of a wolf winter, old loyalties and love are finally put to the test.
   Following the worldwide success of Night Sky and Red Crystal, Clare Francis is now firmly established as a top-flight storyteller, one of our leading writers of adventure fiction. Wolf Winter is her most thrilling story yet - a spellbinding novel of action and intrigue set in the icy wilderness of the Far North.