You're missing the point, which is that there's no need to force every work of fiction into a single genre category. A single work can fit into more than one genre at the same time.
How can I be missing the point when I've said that about a hundred times already?
Greg Cox wrote:
Both approaches are correct. In truth, Shadow on the Sun is both horror and a western . . . .
So I guess then there's no reason to re-define either term then.
Just out of curiosity (and not being familiar with the book), do you think it should be marketed as Science Fiction?