Minneapolis: Coffee House Press, 1999. Trade Paperback. 309p., softbound, first edition 9x6 inch wraps. Upper corner has a tiny ding that has minutely bent a few corner-tips, entirely clean and sound, a very good copy.
Protagonist is a black gay musician in Dachau who survives by playing for SS officers. Per copyright page, Williams seems to have worked on this scenario for more than a decade.