Suggestions for something with a similar feel to "ANNIHILATION"?

Sci-Fi flair but open to whatever, especially horror. Just read Annihilation the other day and once I started I didn't stop until I was finished some hours later lol. I really like paranormal stories set in the real world, full sci-fi or fantasy worlds are often a bit too much for me. Annihilation being essentially set in an "alien world" but experiencing it through "real world" characters was perfect though.

From some of the thing's I've read I get the impression the other books in the Southern Reach series aren't going to be something I'm into but I'm open to be proven wrong.

I've heard of Roadside Picnic and House of leaves but am still iffy on getting them yet. If anyone has anything to say on those I'm all ears.

Thanks.