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John Ferris' work in strategic and intelligence history is widely praised for its originality and the breadth of its research. At last his major pioneering articles are now available in this one single volume.

In Intelligence and Strategy these essential articles have been fundamentally revised to incorporate new evidence and information withheld by governments when they were first published. This volume reshapes the study of communications intelligence by tracing Britain's development of cipher machines providing the context to Ultra and Enigma, and by explaining how...