Goodrich, Norma Lorre, King Arthur, Franklin Watts, 1986.

King Arthur offers an in-depth scholarly look at the
Arthurian legends with the intention of separating reality
from myth.

Littleton, C. Scott, and Linda A. Malcor, From Scythia to Camelot: A Radical Reassessment of the Legends of King Arthur, the Knights of the Round Table, and the Holy Grail, Garland Publishers, 2000.

This book traces Arthurian legends beyond British
history to Russian and Ukranian roots and serves as
a fascinating example of folklore detection.

Scott, Nathan A., Visions of Presence in Modern American Poetry, Johns Hopkins University Press, 1993.

Scott looks at the sense of "reality" in the poetry of
several contemporary poets, including Wilbur, in order
to refute the theory that poetry is a thing of words
unconnected to an objective world experience.

Snyder, Christopher A., An Age of Tyrants: Britain and the Britons, A.D. 400-600, Pennsylvania State University...