For two decades John Walker, Jr. fed secrets absolutely crucial to America's national security to the KGB. Incredibly, for two decades, his treason remained undetected. 

Pete Earley's gripping tale of master spy John Walker, Jr. and his ring - his son, Michael; his brother, Arthur; and his best friend, Jerry Whitworth - is dazzling in its detail and shocking in its revelations.

"The greatest case in KGB history. We deciphered millions of your messages. If there had been a war, we would have won it." - Russian KGB officer Vitaly Yurchenko