Secret world of spies

Discusses different technologies used by spies, such as satellites, lasers, robots, drones, and computer software, and includes career information.

Discusses different gadgets used by spies, such as invisible ink, hidden cameras, small guns made to look like ordinary objects, and bugs, and includes career information.

This book discusses different gadgets used by spies, such as invisible ink, hidden cameras, small guns made to look like ordinary objects, and bugs, as well as career information on espionage.

This book discusses different methods of secret communications used by spies, such as Morse code, the Enigma machine, the Navajo language, and digital steganography, as well as career information on espionage.

This book explores famous and infamous spies in history, including examples of female spies, child spies, family spy rings, and animal spies.