Thomas Rid's revelatory history of cybernetics pulls together disparate threads in the history of technology, from the invention of radar and pilotless flying bombs in World War Two to today's age of CCTV, cryptocurrencies and Oculus Rift, to make plain that our current anxieties about privacy and security will be emphatically at the crux of the new digital future that we have been steadily, sometimes inadvertently, creating for ourselves. A sweeping exploration of man's relationship with machines.