Emperor of Ruin by Django Wexler

Two siblings divided by magic and revolution must finally join forces and rally the people to take down the Twilight Order once and for all in the final book of this brilliantly imagined epic fantasy trilogy. The last surviving Chosen, Ashok has finally risen up and taken control of The Twilight Order. He promises equality and prosperity, but Gyre and Maya know the truth. Only death follows in Ashok's wake. To take him down, Gyre will have to unite old allies, from all across The Splinter Kingdoms and the depths of Deepfire. And Maya will have to seek out a legendary weapon hidden in the mountains that could turn the tide in their battle for freedom. Burning Blade Silver EyeAshes of the Sun Blood of the Chosen Emperor of Ruin.