Review of Behind the Enigma by John Ferris.

Behind the Enigma by John Ferris is a comprehensive and well-written history of GCHQ, Britain's Secret Cyber-Intelligence Agency. The book covers GCHQ's history from its Victorian and First World War beginnings up to its publication in 2020, exploring its organizational evolution, role in World War I and World War II, and development during the Cold War. It also discusses the UKUSA intelligence-sharing agreement and the close relationship between GCHQ and the NSA. The book provides a valuable resource for those interested in the history of intelligence and its influence on British statecraft. [Extracted from the article]