This is a mri warrior from my tri-partite novel The Faded Sun , which you can obtain from DAW Books. The castes are defined by the color of the robes, and black belongs to the kel, the warriors, the Face That Looks Outward. Speaker at the Smithsonian Institution, regarding his art. He'll do commissioned work, as well, including illustrations and portraits. Contact him for details.
Originals are occasionally for sale.
And yes, he is my brother. I'm very proud of him. Other Artists Look in the Other Links menu for the location of Don Maitz' and Janny Wurts' art, and for Michael Whelan's page.