The Stone Sky - N.K. Jemisin

THE FINAL SEASON FALLS.

Essun has mastered the Obelisk Gate. But halfway across the Stillness a pretender rises: Nassun. As the icy white eye of the Moon opens above the world, ancient battle lines are redrawn between mother and daughter, stone eater and orogene, slave and rebel, The destruction of humankind—or something worse—looms nigh.