Deadly Sanction by Roger Elwood

The Oss Chronicles continue in this compelling sequel to Wolf's Lair. Top Allied Agent Stephen Bartlett and his family are kidnapped by Nazi leaders intent on revenge for Bartlett's part in the assassination of an infamous war criminal. But Bartlett escapes and begins a desperate mission to rescue his wife and son from one of the Nazi's harshest concentration camps. He is quickly plunged into a dark world of international intrigue where he's finally faced with an impossible choice. Does he rescue his family--or try to end the war?