Sci fi horror like Severance?

Like every one else on earth rn I’m obsessed with the show severance. I was wondering if anyone knew any good sci-fi horror books with a similar vibe? Idk if it makes sense but what I like most about the show is the sci-fi elements of the severance procedure and the potential horrors of sharing your body with a stranger/only being alive to work/give birth

Would love some recommendations!!