Ghost in the Throne — Jonathan Moeller

Caina Amalas cheated death and escaped certain doom. So did her mortal enemy, the sorcerer Cassander Nilas. Now the city of Istarinmul teeters on the brink of civil war and sorcerous annihilation. Unless Caina summons all her bravery and cunning, Cassander's dark spell will kill millions of people. Starting with the people she loves...