The Last Hieroglyph is the fifth of the five volume Collected Fantasies series. Editors Scott Connors and Ron Hilger have compared original manuscripts, various typescripts, published editions, and Smith's notes and letters, in order to prepare a definitive set of texts.

The Last Hieroglyph includes, in chronological order, all of Clark Ashton Smith's stories from "The Dark Age" to "The Dart of Rasasfa."