Here's two book recommendations that bring a little bit of the fantastic into an Old West (or old west type) setting:
Boneshaker and the more horrific historical Those Who Went Remain There Still. Dreadful Skin reminds me more of the latter, though what it reminds me of most is Lansdale's Dead in the West or Collins' Dead Mans Hand. It's a set of linked short-stories about a former nun pursuing a supernatural menace across Post-Civil War America. It's episodic and none of the stories builds to a climax in quite the way I would have liked, but it's a quick and entertaining read with some nice set pieces: the first story is a cat and mouse game with a werewolf aboard a steamboat trapped by a storm mid-river.
free story at Tor.com set in the Western-ish secondary world of his novel The Half-Made World (which I recommended here) and the upcoming sequel The Rise of Ransom City. In brief, a frontier is being made from the more malleable reality of the wilderness, and humanity is caught between two opposing forces: the technologically more advanced, oppressive order of the Line and the violent chaos represented by the Gun. The short story weaves an epistolary tale of frontier towns and confidence hucksters in the rich world Gilman has built.
22 minutes ago