A direct and speedy narrative - life of mathematician and code-breaker. Can feel the distress and pain of a young school boy in bygone eras ( I hope bygone) where "bookish" boys were treated as misfits at school and also at workplace.
The biography of a man who broke the Enigma code that the German used. This gave much help to the British, especially the Royal Navy, to overcome the German forces during the War World 2.