I am aware that some mythologies/religions include species apart from humans and gods (e.g. Islam and Norse mythology). However, are there any stories which are written about them? My definition for "stories" for this questions, will be stories that are about individuals or groups seen as the protagonists, or heroes, of the stories.
Please note that I am not looking for origin stories of a particular species, nor stories about people who are (semi-)divine, like avatars of Hinduism or demigods of Greco-Roman mythology.