false 6664792 <![CDATA[Codes and Ciphers (Spy Files)]]> http://www.goodreads.com/images/nocover-111x148.jpg The enduring appeal of spies and their technology, codes and mysterious ways are explored in this engaging series of four colorful books. Each explores a different aspect of the spy trade, interspersing historical tidbits with tales of spies from popular culture and contemporary movies. Other titles in this series include: Secret Agents, Spy School, and Top Technology.

Codes and Ciphers covers everything from Caesar's alphabetic substitution system and Morse code to the Enigma machines and microdots of World War II. Sidebars explain how to create a cipher, how to craft invisible ink messages using wax and crayons and how to make a one-time pad.

]]> 6664792 2 6859648 8 2008 Codes and Ciphers (Spy Files) total:1|4:1| 1 4 1 1 9245 3.78 127 17 65749393 1090434 6664792 1595665943 9781595665942 1 <![CDATA[Codes and Ciphers]]> http://www.goodreads.com/images/nocover-111x148.jpg http://www.goodreads.com/book/show/6664792-codes-and-ciphers 4.00 1 The enduring appeal of spies and their technology, codes and mysterious ways are explored in this engaging series of four colorful books. Each explores a different aspect of the spy trade, interspersing historical tidbits with tales of spies from popular culture and contemporary movies. Other titles in this series include: Secret Agents, Spy School, and Top Technology.

Codes and Ciphers covers everything from Caesar's alphabetic substitution system and Morse code to the Enigma machines and microdots of World War II. Sidebars explain how to create a cipher, how to craft invisible ink messages using wax and crayons and how to make a one-time pad.

]]> 4 0 false Wed Jul 01 00:00:00 -0700 2009 Sat Aug 01 06:36:34 -0700 2009 Sat Aug 01 06:40:42 -0700 2009 more...]]> 8 http://www.goodreads.com/book_link/follow/8?book_id=6664792