"There is such a thing as American Indian literature, and it can be divided into several interlocking categories. The major divisions are traditional literature and genre literature of the present. Traditional literature can be further divided into ceremonial and popular varieties—that is, into canonical works and those that derive from the canon but that are widely told and appeal to audiences gathered on social occasions. Contemporary works, or genre literature, can be divided into the classic western categories of poetry, short fiction, the novel, and drama, with the addition of autobiography, as-told-to narrative, and mixed genre works. Structural and thematic elements from the oral tradition, usually from the writer’s own tribe, always show up in contemporary works by American Indians, and elements from contemporary, non-Indian works sometimes show up in contemporaneous tribal social literature."