Okay so that would make him mid-40s when it was released? Seems like a book that would be written by someone younger, but then again 46 back then was probably a LOT older than it is now.
I read his short story collection, Pricksongs & Descants which is from the late 60s and was also on the Larry McCaffery list. I don't really remember any of it but I remember thinking it was good.