William Faulkner’s Yoknapatawpha County NovelsRead about another entry on the list.
Yes, none other than William Faulkner was an enthusiastic builder of shared universes. His series of novels and stories set in Yoknapatawpha County, Mississippi are famously linked by the members of the Compson family, the main characters of The Sound and the Fury, who also appear in Absalom, Absalom! and are referred to in other novels and stories. As in any other multiverse, you can keep your eyes peeled for characters from one book or story to appear in the background of others, ultimately building Yoknapatawpha County into one of the most realistic fictional universes of all time.
--Marshal Zeringue