Ravenloft is a campaign setting for the Dungeons & Dragons roleplaying game. It is an alternate time-space existence known as a pocket dimension or demiplane, called the Demiplane of Dread, which consists of a collection of land pieces called "domains", brought together by a mysterious force known only as the Dark Powers.

Based on List of Ravenloft publications - Wikipedia

If you are interested in the suggested reading list located in the back of the 5e Players handbook, check out this reading challenge.  Dungeons & Dragons Player's Handbook Inspirational Reading | The StoryGraph

If you are interested in other campaign settings novels, check out these reading challenges: