books similar to the wall by marlene haushofer?

I have read ‘I who have never known men’, and ‘The Road’ which both remind me of The Wall. Are there any books out there that have the same kind of feeling as ‘the wall’? I like the dystopian, Sci-fi feel and I also like how a lot of questions never get answered. I enjoyed the internal narration of the female character(s) in ‘i who have never known men’ and ‘the wall’. thanks!