"Written genres" (more commonly known as "literary genres") are those works of prose, poetry, drama, hybrid forms, or other literature that are distinguished by shared literary conventions, similarities in topic, theme, style, tropes, or common settings, character types, or formulaic patterns of character interactions and events, and an overall predictable form. Genres are not wholly fixed categories of writing, but their content evolves according to social and cultural contexts and contemporary questions of morals and norms. The most enduring genres are those literary forms that were defined and performed by the Ancient Greeks, definitions sharpened by the proscriptions of our earliest literary critics and rhetorical scholars such as Plato, Aristotle, Socrates, Aeschylus, Aspasia, Euripides and others. The prevailing genres of literary composition in Ancient Greece were all written and constructed to explore cultural, moral, or ethical questions; they were ultimately defined as the genres of epic, tragedy, and comedy. Aristotle's proscriptive analysis of tragedy, for example, as expressed in his Rhetoric and Poetics, saw it as having six parts (music, diction, plot, character, thought, and spectacle) working together in particular ways. Thus Aristotle establishes one of the earliest delineations of the elements that define genre.
Literary genres are often defined by the cultural expectations and needs of a particular historical and, cultural moment or place.
A genre may fall under one of two categories: fiction and nonfiction. Any genre can be either a work of fiction (nonfactual descriptions and events invented by the author) or a work of nonfiction (a communication in which descriptions and events are understood to be factual).
Textbook – authoritative and detailed factual description of a thing
Literary fiction vs. genre fiction
Literary fiction is a term used to distinguish certain fictional works that possess commonly held qualities to readers outside genre fiction. Literary fiction has been defined as any fiction that attempts to engage with one or more truths or questions, hence relevant to a broad scope of humanity as a form of expression. Genre fiction is a term used to distinguish 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. There are many sources that help readers find and define literary fiction and genre fiction.