Western Science Fiction. It's a thing.

Dig down into Amazon Best Sellers - Westerns and you'll find a Science Fiction category. There, hanging out with some dude named Louis L'Amour, is "The Devil in Snakeskins." (L'Amour also has HIS OWN CATEGORY, by the way. So, you know, I guess he's made it.) Released yesterday, May 19, "Snakeskins," is also on the "Hot New Releases" list. Good stuff.