Product Description: Can flashing lights send out a secret message? Did a famous spy use sketches of butterflies to hide messages? Can a digital photo hide a secret code? For centuries, spies have used many different ways to pass secret information. Codes and ciphers keep information safe from the enemy...read more

Product Description: This Big Nate activity book is bursting with exclusive activities. Includes mazes, sudoku, crossword puzzles, doodle games, comics, secrets codes, and much more!Nate may not be Joe Honor Roll, but he knows he's meant for big fun. He's always up for scribbling games, jokes, laughs, and creating comics...read more

Product Description: Learn of the importance of espionage and intelligence as a factor in international events, such as World War Two, and the Cold War. Full of fascinating information on codes and codebreakers, and the role of spies, in both a historical context, and today.