Spies have existed from the time of Ancient Greece to the present day. They have always traded in information. Hidden within the opponent's organization, they provide a unique advantage to their employer, help secure victories in commercial and military battles, and cover potential weaknesses.

Password codes, digital encryption, forged documents, blind spots in exchanges, satellite monitoring, undetectable poisons: these are the "tools" of the trade; however, survival requires courage and cunning.

From the legendary Mata Hari, the Enigma machine, the Stalinist Red Orchestra, the Cold War, to the CIA's relationships with Osama bin Laden and the connections between MI6, the KGB, and President Putin, SPYING reveals all the previously classified cases and leaves us speechless at the role and actions of the spies who live among us.