For much of the world, turning on electricity is as easy as flipping a switch, but that wasn’t always the case. At the end of the nineteenth century, two geniuses competed to change the world: Thomas Edison and Nikola Tesla. In the War of Currents, they fought to shape the world with their electrical systems. Without Edison and Tesla, we might not have the lightbulb, the radio, affordable electricity, and movies. This book examines the lives of these two inventors, their dizzying array of creations, and a professional rivalry that began the moment they met each other.