Jack Vance is a notable science-fiction and fantasy writer. His Dying Earth series is particularly noteworthy as the genesis of the tropes of Vancian spellcasting, particularly the fire-and-forget nature of powerful spells, which heavily influenced the original Dungeons & Dragons. The Dying Earth role-playing game is based on his works.
He is also the author of the Lyonesse trilogy, which has its own licensed role-playing game.