Quag Keep by Andre Norton
Let us venture back to 1978 for the very first novel about a role playing game. A group of adventures, including a Lizard Man, have these strange and vague memories of living in a technological society and having some hobby that involved books, papers, and dice. Dice just like the ones on the bracelets locked on their wrists that spin when they do things like fight or cast spells. Nearly four decades later, there is a pocket industry of game related novels. They all trace their roots to this classic.