Rio's sequel is a 2014 book.
Donald R. Kaye -LRB- June 27 , 1938 -- January 31 , 1975 -RRB- was the co-founder of Tactical Studies Rules -LRB- TSR -RRB- , the game publishing company most famous for their Dungeons & Dragons -LRB- D&D -RRB- role-playing game .. Dungeons & Dragons. Dungeons & Dragons. role-playing game. role-playing game. Tactical Studies Rules. TSR, Inc.. He and TSR co-founder Gary Gygax had been friends since childhood , sharing an interest in miniature war games .. Gary Gygax. Gary Gygax. miniature war games. Miniature wargaming. In 1972 , Kaye created Murlynd , one of the first D&D characters , and play-tested him in Gygax 's Castle Greyhawk campaign .. Murlynd. Murlynd#Creative origins. Castle Greyhawk. Castle Greyhawk. Kaye and Gygax were convinced that D&D and similar games were an excellent business opportunity , and together they founded Tactical Studies Rules in 1973 .. Tactical Studies Rules. TSR, Inc.. However , only two years later , just as sales of D&D started to rise , Kaye unexpectedly died of a heart attack at age 36 .