In science fiction and fantasy terminology, constructed worlds are imaginary settings entirely apart from Earth and the real world. Well-known examples include “a galaxy far, far away” for the Star Wars saga, and George R. R. Martin's continents of Westeros and Essos. Authors like me love inventing new worlds for stories for a number of reasons, but two strike me as most significant: first, a constructed world's history can be tailored specifically for the needs of the story. And second, a constructed world is just so much fun to create. I have as much fun (and sometimes even more!) creating a new world as I do writing a short story or novel.