Ghost in the Inferno — Jonathan Moeller

CAINA AMALAS is the Ghost circlemaster of Istarinmul, leader of the Emperor's spies in the city. She has defeated powerful foes, but more dangerous enemies lie before her. A sorcerous catastrophe threatens to destroy Istarinmul, and the only the mysterious sorceress Annarah, last loremaster of lost Iramis, knows how to stop it. To rescue Annarah and save Istarinmul, Caina must brave the Inferno, the hellish fortress of the sinister Immortals. But those who enter the Inferno never return...