The Bone Shard Emperor (Drowning Empire)

"Lin Sukai finally sits on the throne she won at so much cost, but her struggles are only just beginning. Her people don't trust her. Her political alliances are weak...Yet an even greater threat is on the horizon, for the Alanga, the powerful magicians of legend, have returned to the Empire. They claim they come in peace, and Lin will need their help in order to defeat the rebels and restore peace"--