The Book of the Unnamed Midwife by Meg Elison
The Book of the Unnamed Midwife follows the struggle for survival (and sometimes sanity) of the title character after a plague takes down civilization – and leaves only one woman alive for every ten men who survive.
What follows is a no holds barred account of just how dangerous and lonely the End of the World can be – and how a world without civilisation can fracture our ability to trust, care, and depend on others.