Margaret Frith lives in Manhattan and North Port, New York. John O'Brien lives in Deleran, New Jersey. Nancy Harrison lives in Allentown, Pennsylvania.
One day in 1882, Thomas Edison flipped a switch that lit up lower Manhattan with incandescent light and changed the way people live ever after. The electric light bulb was only one of thousands of Edison's inventions, illuminated in John O'Brien's wonderful black-and-white illustrations.