DK Eyewitness Books: ElectricityThe most trusted nonfiction series on the market, Eyewitness Books provide an in depth, comprehensive look at their subjects with a unique integration of words and pictures. Eyewitness: Electricity presents the story of electricity from the earliest discoveries to the technologies of today explaining how our eyes receive light rays and turn them into electrical signals, how the chemicals in batteries work, how the invention of electric motors allowed