An index of references to books, gods, races, places, and people in works by first-generation Cthulhu Mythos authors. This work is gradually being converted from an index into something more like an encyclopedia, with articles rather than just index entries. See, for example, Azathoth, Cthulhu, Nyarlathotep, and Yog-Sothoth.

NEW: Links have been added from each article to the online text of the story they mention, if it is available.