Urban fantasy is a fantastic genre, though many consider it to be a subgenre of fantasy, in which the narrative has magical rules or elements operating in an urban setting. Works of urban fantasy may be set in the real world and introduce aspects of fantasy, or in a fantasy world with operating rules recognizably similar to ours. Elements such as discovery of earthbound mythological creatures, coexistence or conflict between humans and paranormal beings, and the changes such characters and events bring to local life are the mainspring. Many authors, publishers, and readers distinguish them from works of paranormal romance, which use similar characters and settings, but focus on the romantic relationships between characters. A contemporary setting is not strictly necessary for a work of urban fantasy: works of the genre may also take place in futuristic and historical settings, actual or imagined, as long as the rules remain recognizably those of the present universe.
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