Breath of Fire by Amanda Bouchet

SHE’S DESTINED TO DESTROY THE WORLD…
“Cat” Catalia Fisa has been running from her destiny since she could crawl. But now, her newfound loved ones are caught between the shadow of Cat’s tortured past and the threat of her world-shattering future. So what’s a girl to do when she knows it’s her fate to be the harbinger of doom? Everything in her power.

BUT NOT IF SHE CAN HELP IT
Griffin knows Cat is destined to change the world-for the better. As the realms are descending into all-out war, Cat and Griffin must embrace their fate together. Gods willing, they will emerge side-by-side in the heart of their future kingdom…or not at all.