Blood Rain

In the end of the Warrior Class series, Ashni and Nakia are establishing their new kingdom in the West. Raiding parties from the North put their work at risk. Ashni is poisoned in battle, so Nakia has to step up as sole reigning monarch. With her spouse on the brink of death, Nakia has to master her leadership role, even as Ashni's older brother show up unannounced to make the situation worse.
Blood Rain includes violence and abuse, and is recommended for mature readers.