Lost Worlds is a collection of fantasy, horror and science fiction short stories by the American writer Clark Ashton Smith. It was published in 1944 and was the author's second book published by Arkham House. 2,043 copies were printed. The stories for this volume were selected by the author. The collection contains stories from Smith's major story cycles of Hyperborea, Atlantis, Averoigne, Zothique and Xiccarph. Source: Wikipedia (en)