How do you know what you know is true? During the blizzard of 1978, a woman is discovered face down at the edge of her Delaware estate, a boxer, half-dead, by her side. Nearby, in a deep ravine, a CIA officer lies buried under two feet of snow. Their secret meeting-sabotaged. When Emma Quinn gets a call in her Manhattan apartment-your grandmother, out walking her dog, found dead in the snow-she has no reason to suspect foul play. A history professor at Columbia and the sole heir to the Quinn fortune, she heads down to Delaware, where her grandmother's death has triggered a series of unsettling events-a break-in at the estate, an unexpected visit from the CIA and the discovery of a disturbing collection of news clippings in an upstairs study-about hijackings, bombings and acts of terror. Back in Manhattan, Emma is being followed by a mysterious stranger. Her distress grows when she meets a well-known historian, a Scotsman and Sovietologist named Angus McLearan, who accuses her late grandfather of wrongdoing during the 1930s and '40s. Determined to clear her grandfather's name and to understand her grandmother's fate, Emma