This title describes the remarkable intellectual achievements and parallel narratives of two groups of codebreakers working at the same time, but independently: those involved in breaking the Second World War codes and those who deciphered the ancient script of Linear B - Europes earliest comprehensible writing system. Illustrations include an Enigma machine, a rare loan from GCHQ, and unique archival documents held at the University of Cambridge, as well as archaeological artefacts showing the Linear B script.