In the original dustsheet. Black cloth binding with white title on the spine.

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Tied to a Channel 4 television series in three one-hour parts, this is the story of the breaking of the Enigma code at Bletchley Park during World War II. That remarkable feat – breaking a code that the Germans believed to be unbreakable – was to play a major part in the outcome of the war. The book draws on official files and the testimonies of survivors to tell the story of a unique institution and the people who worked there. Examples designed to be intelligible to the layman are provided to illustrate how the code worked and how it was deciphered.

Review:

When “Captain Ridley’s shooting party” arrived at Bletchley Park in 1939 no-one would have guessed that by 1945 the guests would number nearly 10,000 and that collectively they would have contributed decisively to the Allied war effort. Their role? To decode the Enigma cypher used by the Germans for high-level communications. Their work has already inspired Robert Harris’s novel Enigma and now a Channel 4 series has been produced, which this book accompanies.

It is an astonishing story. A melting pot of Oxbridge dons (including Alan Turing, the father of the modern computer), maverick oddballs and more regular citizens worked night and day at Station X, as Bletchley Park was known, to derive intelligence information from German coded messages. Bear in mind that an Enigma machine had a possible 159 million million million different settings and the magnitude of the challenge becomes apparent. That they succeeded, despite military scepticism, supplying information that led to the sinking of the Bismarck, Montgomery’s victory in North Africa and the D-Day landings, is testament to an indomitable spirit that wrenched British intelligence into the modern age, replacing false beards and dodgy accents with a technological precision that was to be fundamental as the Second World War segued into the Cold War.

Michael Smith constructs his absorbing narrative around the reminiscences of those who worked and played at Bletchley Park, and their stories add a very human colour to what was a highly cerebral activity, remote as it was from the blood and loss of the battlefield, but with such direct bearing. The code breakers of Station X did not win the war but they undoubtedly shortened it, and the potential lives saved on both sides stand as their greatest achievement. –David Vincent