Genre fiction, also known as formula fiction or popular fiction, is a term used in the book-trade for fictional works written with the intent of fitting into a specific literary genre in order to appeal to readers and fans already familiar with that genre.The main genres are crime, fantasy, romance, science fiction and horror—as well as perhaps Western, inspirational and historical fiction. Slipstream genre is sometimes thought to be in between genre and non-genre fiction. Source: Wikipedia (en)