Spies, Code Breakers, and Secret Agents - Carole P Roman - Bog

"From spy schools and ciphers to sneaky tools and secret armies, this guide takes you on a declassified tour of the undercover operations that helped decide the outcome of World War II. There's also more than a dozen short 'spy-ographies' that cover some of the most famous (and infamous!) agents who were active during the war." -- Back cover.