Seek the Traitor's Son

Elegy Ahn is a soldier who guards her small country against the Talusar, a stronger nation whose religion is built around a deadly Fever. When she and the Talusar general Rava Vidar are summoned to hear a prophecy that only one of them will lead their people to victory, their fates are tied together, and the future of both nations hangs on how it ends.

The first book in the Burning Empire series.