I’ve been on a cosmic horror kick lately, and what I’d really like to read is stories or novels of the awful and unfathomable on a spaceship. Stories where we go to them, poke what shouldn’t be poked, scan what shouldn’t be scanned, and things proceed from there.
It’s not exactly Cthulhu but the revelation space has ships that are monstrous and so old that people barely ever go to most of the parts of them. Could be worth a read.
Alastair Reynolds is the author. It’s not really horror exactly but some screwed up stuff in em. That’s all I got for you sorry! I’ll follow this to see what others suggest