The Fallen Gods Tome 3
Faithbreaker

War has come to Middren. The fire god Hseth is leading an unstoppable army south, consuming everything in her path. The kingdom's only hope of survival is for allies and old foes to unite. Elo navigates an uneasy alliance with Arren : his friend, his enemy, and his king. Now they must both decide how much they're willing to sacrifice to turn the tides of war. Meanwhile, Inara joins her mother on their ship, the Silverswift, to seek aid.
Still grappling with her powers, Inara must reckon with who - and what - she is, while Skedi questions if their bond will be enough to keep them safe. Kissen has no allegiance to the old ways of Middren. But as she tries to find her family, she is forced to question what she is fighting for. And-if they can win at all.