In the years that follow, that stranger, Adolf Tolkachev, becomes one of the West’s most valuable spies. At enormous risk, Tolkachev and his handlers conduct clandestine meetings across Moscow, using spy Cameras, disguises, and secret codes to elude the KGB in its own backyard until a shocking betrayal puts them all at risk.

Drawing on previously classified CIA documents and interviews with first-hand participants, 7he Billion Dollar Spy is a brilliant feat of reporting and a riveting true story from the final years of the Cold War.