The Emelan Universe, also known as Circle Universe, is the setting of two quartets and three stand-alones by Tamora Pierce. As the country of Emelan is the main backdrop for most of the books, it is dubbed the Emelanese Universe. "Circle Universe" refers to the titles of the first two quartets. This is much like the Tortallan Universe—as Tortall is the main setting for most of the books in that universe as well.