E. E. "Doc" Smith
Edward Elmer Smith (May 2, 1890 – August 31, 1965), publishing as E. E. Smith, Ph.D. and later as E. E. "Doc" Smith, was an American food engineer (specializing in doughnut and pastry mixes) and science-fiction author, best known for the Lensman and Skylark series. He is sometimes called the father of space opera.
Source: Wikipedia