The Tyrant's Law - Daniel Abraham

The great war cannot be stopped. The tyrant Geder Palliako begins a conquest aimed at bringing peace to the world, though his resources are stretched too thin. When things go poorly, he finds a convenient target among the thirteen races and sparks a genocide. Clara Kalliam, freed by having fallen from grace, remakes herself as a ''loyal traitor'' and starts building an underground resistance movement that seeks to undermine Geder through those closest to him. Cithrin bel Sarcour is apprenticing in a city that''s taken over by Antea, and uses her status as Geder''s one-time lover to cover up an underground railroad smuggling refugees to safety. And Marcus Wester and Master Kit race against time and Geder Palliako''s men in an attempt to awaken a force that could change the fate of the world.