Physical Description:32 pages : color illustrations ; 29 cm.print
Publisher:Mankato, MN : Smart Apple Media, c2010.
General Note: Includes index.
Formatted Contents Note: Spying on the enemy -- Spies in the ancient world -- The first spymasters -- Spying for the Revolution -- Agents for the Union -- The Great War -- Spies in World War II -- Spying in the Cold War -- Double agents -- Secret War on Terror.