There are hundreds of novels based on the role playing game Dungeons and Dragons. At first D&D was published by TSR, they got bought out by Wizards of the Coast in 1997. Novels are generally based in campaign settings of the D&D universe. However the novels are open to general audiences (you don't have to play the game to understand the novels.) The best selling settings are Dragonlance and Forgotten Realms, the other settins are: Birthright, Dark Sun, Eberron, Greyhawk, Kara-Tur, Mystara, Planescape, Ravenloft, and Spelljammer.
Greyhawk, also known as the World of Greyhawk, is a fictional world designed as a campaign setting for the Dungeons & Dragons fantasy roleplaying game. Although not the first campaign world developed for Dungeons & Dragons—Dave Arneson's Blackmoor campaign predated it by over a year — the world of Greyhawk was the setting most closely identified with the development of the game from 1972 until 2008. The world itself started as a simple dungeon under a castle designed by Gary Gygax for the amusement of his children and friends, but it rapidly expanded to include not only a complex multi-layered dungeon environment, but also the nearby city of Greyhawk, and eventually an entire world. In addition to the campaign world, which was published in several editions over twenty years, Greyhawk was also used as the setting for many adventures published in support of the game, as well as for RPGA's massively shared Living Greyhawk campaign from 2000–2008.
Dungeons and Dragons: Birthright novels
Dungeons and Dragons: Dark Sun novels
Dungeons and Dragons: Dragonlance novels
Dungeons and Dragons: Eberron Novels
Dungeons and Dragons: Forgotten Realms novels
Dungeons and Dragons: Greyhawk novels
Dungeons and Dragons: Iconic Characters novels
Dungeons and Dragons: Mystara novels
Dungeons and Dragons: Planescape novels
Dungeons and Dragons: Ravenloft Novels
Dungeons and Dragons: Spelljammer Novels
Dungeons and Dragons: Comics and Graphic Novels