Change your perception of the past and you'll discover the secret history of the future. From the world's first cyber attack in 1834, to 19th century virtual reality, The Economist's Tom Standage and Slate's Seth Stevenson examine the ancient ingenuity that our modern digital technology can learn from, and expose age-old weaknesses that we are already on a course to repeat. Only by discovering what time has to offer can we really learn about ourselves.