fan fiction

New Adventures of Alice (1917) by John Rae, an early pastiche or fan fiction Fan fiction or fanfiction, also known as fan fic, fanfic, fic or FF, is fiction typically written in an amateur capacity by fans as a form of fan labor, unauthorized by, but based on, an existing work of fiction. The author uses copyrighted characters, settings, or other intellectual properties from the original creator(s) as a basis for their writing and can retain the original characters and settings, add their own, or both. Fan fiction ranges in length from a few sentences to novel-length and can be based on fictional and non-fictional media, including novels, movies, comics, television shows, musical groups, theatrical productions, cartoons, web series, anime, manga, and video games.

Fan fiction is rarely commissioned or authorized by the original work's creator or publisher or professionally published. It may infringe on the original author's copyright, depending on the jurisdiction and on legal questions, such as whether or not it qualifies as "fair use" (see Legal issues with fan fiction). The attitudes of authors and copyright owners of original works towards fan fiction have ranged from encouragement to indifference or disapproval, and they have occasionally responded with legal action.