There's a new book on Sun Ra out: "Traveling the Spaceways: Sun Ra, the Astro Black and other Solar Myths".
from the publisher:
"With essays based on presentations at a 2006 symposium at the Hyde Park Art Center, this book offers a cornucopia of ideas and images spurred by the musician and mystic Sun Ra. A companion to two previous books published by WhiteWalls, "The Wisdom of Sun-Ra," and "Pathways to Unknown Worlds," "Traveling the Spaceways" considers Ra's work from art historical and musical perspectives, as well as looking at his growing influence on contemporary visual art. The book is co-edited by John Corbett, Anthony Elms, and Terri Kapsalis; contributors include Cheryl Lynn Bruce, Robert Campbell, Kevin Whitehead, Graham Lock, John Corbett, Victor Margolin, Phil Cohran, Kerry James Marshall, Calvin Forbes, Terri Kapsalis, Anthony Elms, Malik Gaines, Karl Erickson, and Glenn Ligon."