The Mozart code : a novel / Rachel McMillan.

Lady Sophia Huntington Villiers is no stranger to intrigue, as her work with Alan Turing's Bombe Machines at Bletchley Park during the war attests. Now, as part of Simon Barre's covert team in postwar Vienna, she uses her inimitable charm and code name Starling to uncover a lethal double agent immersed in the world of relics--including the death mask of Mozart. Simon Barrington, eighth earl of Camden, is determined to end the Cold War before it becomes as devastating as the war Britain has just won. He has been in love with Sophie Villiers since the moment he met her. A marriage of convenience to save Simon's estate brings them closer until a mission in Prague drives Sophie to a decision that will brand her not only a traitor to her country but also to her new husband. With Sophie's allegiance in question, Simon is torn between his duty to the crown and saving the woman who might have betrayed his cause and his heart.