The Obelisk Gate: The Broken Earth, Book 2N. K. Jemisin
THIS IS THE WAY THE WORLD ENDS . . . FOR THE LAST TIME.
The season of endings grows darker, as civilisation fades into the long cold night. Essun - once Damaya, once Syenite, now avenger - has found shelter, but not her daughter. Instead there is Alabaster Tenring, destroyer of the world, with a request. But if Essun does what he asks, it would seal the fate of the Stillness forever. Far away, her daughter Nassun is growing in power - and her choices will break the world.