A thrilling novel based on actual events, about the nature of genius, the cost of ambition, and the battle to electrify America, from the Oscar-winning screenwriter of The Imitation Game. New York, 1888. Gas lamps still flicker in the city streets, but the miracle of electric light is in its infancy. The person who controls the means to turn night into day will make history - and a vast fortune. Now made into a major film starring Eddie Redmayne.