The Saga of the Volsungs (Völsunga Saga)
This 13th century Icelandic Saga tells of the rise and fall of the Völsung clan.

Other Books
Norse Revival: Transformations of Germanic Neopaganism
Trolldom
The Poetic Edda, Larrington
Wights and Ancestors
Seventy-Eight Degrees of Wisdom
The Poetic Edda, Crawford
Volsunga Saga
Northern Mythology V2
The Prose Edda, Public Domain
The Poetic Edda, Bellows