Between Dawn and Dusk by Jamie Schlosser

I’ve got a problem. A big muscly problem, with icy blue eyes, long dark hair, and tight leather pants.
Keryth is the Night Realm king. My father’s greatest enemy. And my fated mate.
It isn’t easy being a fae princess of the Day Realm. Our kingdom has suffered hardships, but if my father won’t approve of the mating bond with Keryth, they’ll be putting another body in a casket—mine. If we’re kept apart, we’ll both die. Not to be dramatic or anything. Destiny just doesn’t like to be denied, and our sanity will wither away if we don’t give in.
Too bad my father doesn’t care about that. His solution is to lock me away forever.
When Keryth comes to rescue me, I know we can take on anything as long as we’re together. But old rivalries die hard, and the past sins of our families come back to haunt us, affecting our future and the ones we love the most.