Thieves' World is a shared world fantasy series created by Robert Lynn Asprin in 1978. The original series comprised twelve anthologies, including stories by science fiction authors Poul Anderson, John Brunner, Andrew J. Offutt, C. J. Cherryh, Janet Morris, and Chris Morris. First published in 1979, the series went on hiatus in 1989 after the twelfth anthology. In addition to the official anthologies, several authors published novels set in Thieves' World.