The Obelisk Gate – N. K. Jemisin

The season of endings grows darker, as civilization 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.