The Valkyrie Prophecy (The Valkyrie Duology #2) by JA Townsend:
 
A forgotten prophecy. A queen’s burden. A realm on the brink of war.

Lena, the Valkyrie Queen, fights to restore balance after betrayal and chaos have torn her people apart. As she unearths secrets hidden in mountain caves and uncovers whispers of a destiny, she must rally her people, confront ancient gods, and navigate a growing war that threatens all realms.

Amid betrayals, unexpected alliances, and a spark that burns brighter between her and Lachlan, a prophecy tying her to an unimaginable fate looms over her. Lena must confront the weight of her legacy—and find the strength to defy it. But as evil surges, she must wield her heart and axe to protect everything and everyone she loves.

The Valkyrie Prophecy is an epic tale of magic, fate, and the power of love in the face of a world-ending war.