Wartime spies /
Andrew Langley.
- Mankato, MN : Smart Apple Media, c2010.
- 32 p. : col. ill. ; 30 cm.
- Spies and spying. .
Includes index.
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.