John Helyar
 John Helyar (b.1951) an American journalist for the Wall Street Journal is the author of the books Lords of the Realm: The Real History of Baseball which according to WorldCat is held in 688 libraries and coauthor with Bryan Burrough of Barbarians at the Gate: The Fall of RJR Nabisco wnicn is held in 2249 libraries and was made into the film of the same title.