Suggest me a book with a good dark atmosphere (if that makes sense?)

I've cleared my reading backlog and I'm looking to rebuilt it, haha. I've been reading a lot of 'southern gothic-ish' horror lately, so something in that vein would be appreciated. I enjoyed 'Those Across The River' by Christopher Buehlman and 'A Winter Haunting' by Dan Simmons. Otherwise just something with a sort of desolate/impending doom vibe, that kept you thinking about it long after it's conclusion.

Thanks!