The Code Book: The Secret History of Codes and Code-Breaking by Simon Singh NEUF

The Code Book: The Secret History of Codes and Code-breaking, Simon Singh

The Mammoth Book of Secret Code Puzzles

The Code Book: The Secret History of Codes & Code-Breaking

The Usborne Book of Secret Codes

The Secret History of Wonder Woman by Lepore, Jill [Hardback] NEUF

Intercept: The Secret History of Computers and Spies

State of War: The Secret History of the CIA and the Bush Administration