Bob Duff is one of the country's foremost hockey historians. He has written or collaborated on numerous hockey books, including History of Hockeytown, the first official history of the Detroit Red Wings, 19, the story of Steve Yzerman's career, Nine: The Story of Gordie Howe, The China Wall, Johnny Bower's official biography and From Normandy to Hockeytown, Budd's Lynch's biography. Duff has also contributed to Total Hockey and the NHL Guide and Record Book and was among the selection panel that picked The Hockey News' 50 Greatest NHL players.