John Eric Holmes, MD (February 16, 1930 - March 20, 2010) was an American game designer who was a former associate professor of neurology at the University of Southern California, School of Medicine. He has been a writer of non-fiction along with fantasy and science fiction and was a promoter of fantasy role-playing games and Edgar Rice Burroughs.
He was the editor of the Dungeons & Dragons 2nd Version rulebook, 1st through 7th printings, 1977-1979. He also wrote the book’s sample adventure, also known as The Dungeon of Zenopus.
John Eric Holmes died on March 20, 2010 of a stroke.