The Morgaine Stories, also known as The Morgaine Cycle, are a series of science fantasy novels by science fiction and fantasy writer C. J. Cherryh, published by DAW Books. They concern a time-traveling heroine, Morgaine, and her loyal companion Nhi Vanye i Chya. This series has been identified as being set in the Alliance-Union universe, as it is stated that Morgaine was sent on her quest by the "Union Science Bureau".