The Volsunga Saga is a late 13th century Icelandic prose rendition of the story of Sigurd and Brynhild, and the destruction of the Burgundians. It is largely based on epic poetry.
A full text translation of the Volsunga Saga by is at the University of California, Berkeley's Online Medieval and Classical Library
Read the Volsunga Saga here: http://sunsite.berkeley.edu/OMACL/Volsunga/