Merchanter's Luck is a science fiction novel written by C. J. Cherryh. It is set in the author's Alliance-Union universe, in which humanity has split into three major power blocs: Union, the Merchanter's Alliance and Earth. In the context of the Alliance-Union universe, the book is one of Cherryh's Merchanter novels. Merchanter's Luck was reprinted in 2008 along with Cherryh's novel Forty Thousand in Gehenna in an omnibus volume entitled Alliance Space.