A wartime novel based on a true story. The Cypher Bureau. Gripping stuff.
The Cypher Bureau
My review -
Between the wars, three young Polish mathematicians are set the task of decoding messages from the German Enigma machine. One of them, Marian, manages to make a replica version, including both the mathematics and the mechanics of the task in his solution. When the war starts they are conscripted into the army and their lives take a different turn. Separated from his wife for six years in wartime, Marian, goes back to Poland afterwards rather than start a new life in Britain. The story is intriguing, harrowing, enlightening and always interesting. I enjoyed it very much.