<p>Black Cipher signals the dawn of the cryptothriller.<br />
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Payne Harrison， the author of the best-selling Storming Intrepid and Thunder of Erebus， spins his narrative magic vet again -- this time exploring the fascinating but clandestine world of codebreaking and signals intelligence.<br />
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Secluded in the quiet Gloucestershire township of Cheltenham is the hypersecret codebreaking and signals intelligence enclave of the British spy machine. Known as Government Communications Headquarters， it is home to a small army of eavesdroppers， linguists， and codebreakers who secretly probe the airwaves for the defense of the realm.<br />
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Within this high-tech fortress is a man of great mystery， urbanity， and elan， whose powers in the field of cryptanalysis are nothing short of legendary. His name is Fai</p>
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