THE OBELISK GATE (Broken Earth Series #2) by 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.