Genres

Wikipedia provided a set of genres for us to consider, to which we can add others including erotica:

Fiction			Non-Fiction
Classic	fiction that has become part of an accepted literary canon, widely taught in schools		Biography	a narrative of a person's life; when the author is also the main sub, this is an autobiography.
Comics / Graphic novel	comic magazine or book based on a sequence of pictures (often hand drawn) and few words.		Essay	a short literary composition that reflects the author's outlook or point.
Crime / detective	fiction about a crime, how the criminal gets caught, and the repercussions of the crime		Owner's manual (also Instruction manual, User's guide)	an instructional book or booklet that is supplied with consumer products such as vehicles, home appliances, firearms, toys and computer peripherals
Fable	legendary, supernatural tale demonstrating a useful truth		Journalism	reporting on news and current events
Fairy tale	story about fairies or other magical creatures		Lab Report	a report of an experiment
Fan fiction	fiction written by a fan of, and featuring characters from, a particular TV series, movie, or book. Usually published on online platforms such as Fanfiction.net or Wattpad		Memoir	factual story that focuses on a significant relationship between the writer and a person, place, or object; reads like a short novel
Fantasy	fiction in a unreal setting that often includes magic, magical creatures, or the supernatural		Narrative nonfiction / personal narrative	factual information about a significant event presented in a format that tells a story
Folklore	the songs, stories, myths, and proverbs of a people or "folk" as handed down by word of mouth		Reference book	such as a dictionary, thesaurus, encyclopedia, almanac, or atlas
Historical fiction	story with fictional characters and events in an historical setting		Self-help book	information with the intention of instructing readers on solving personal problems.
Horror	fiction in which events evoke a feeling of dread and sometimes fear in both the characters and the reader		Speech	public address or discourse
Humor	usually a fiction full of fun, fancy, and excitement, meant to entertain and sometimes cause intended laughter; but can be contained in all genres		Textbook	authoritative and detailed factual description of a topic.
Legend	story, sometimes of a national or folk hero, that has a basis in fact but also includes imaginative material
Magical realism	story where magical or unreal elements play a natural part in an otherwise realistic environment
Meta fiction	(also known as romantic irony in the context of Romantic works of literature) uses self-reference to draw attention to itself as a work of art while exposing the "truth" of a story
Mystery	fiction dealing with the solution of a crime or the revealing of secrets
Mythology	legend or traditional narrative, often based in part on historical events, that reveals human behavior and natural phenomena by its symbolism; often pertaining to the actions of the gods
Mythopoeia	fiction in which characters from religious mythology, traditional myths, folklore and/or history are recast into a re-imagined realm created by the author
Picture book	picture storybook is a book with very little words and a lot of pictures; picture stories are usually for children
Realistic fiction	story that is true to life
Science fiction	story based on the impact of actual, imagined, or potential science, often set in the future or on other planets
Short story	fiction of great brevity, usually supports no subplots
Suspense / thriller	fiction about harm about to befall a person or group and the attempts made to evade the harm
Tall tale	humorous story with blatant exaggerations, such as swaggering heroes who do the impossible with nonchalance
Western	fiction set in the American Old West frontier and typically in the late eighteenth to late nineteenth century