The Barutugisun is the mythic history of the Yonggan people in written form. The text dates from the 800s BG, and it has been variously redacted since. The most common text type today is confidently traced to literati working under the Duke of Wa during the Ri dynasty. This text and translations of it are available as printed books in the Earth Kingdom.
The book tells the story of Yonggan culture hero Barutu and his family, especially the sons and daughters who became ancestors to various Yonggan clans. Some Yonggan interpret it more or less literally, but not all, and the theologians of the State Religion of the Great Ri promoted an allegorical reading as primary without comment on its historical accuracy.