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.