How many times did the author of Super/System win the world series of poker?
Super/System: Super/System, one of the first books about poker strategy, was written and published in 1979 by Doyle Brunson, a professional poker player and multiple winner at the World Series of Poker. Doyle Brunson:  He is a two-time World Series of Poker (WSOP) Main Event champion, a Poker Hall of Fame inductee, and the author of several books on poker.
two-time