Who has written the maximum number of books?

Phillip M Parker, an American, has written 200,000 books. He has devised computer algorithms which write text, search and do many more defined operations which have helped him write these books. Among his publications include The Official Patient’s Sourcebook on Acne Rosacea (168 pages), Stickler Syndrome: A Bibliography and Dictionary for Physicians and Sets That Measure 6-Feet by 9-Feet or Smaller in India (144 pages).

The Guinness Book of World Records ranks Mary Faulkner (1903-1973) as the most prolific novelist, having written 904 books. Mary wrote under six pen names, which include Kathleen Lindsay, Margaret Cameron, Mary Richmond and Hugh Desmond.