Lakota Belief and Ritual
Edited by Raymond J. DeMallie and Elaine A. Jahner.
"In the writing of Indian history, historians and other scholars seldom have the opportunity to look at the past through 'native eyes' or to immerse themselves in documents created by Indians. For the Oglala and some of the other divisions of the Lakota, the Walker materials provide this kind of experience in fascinating and rich detail during an important transition period in their history." - Minnesota History