Rose Bound by J.J. Marshall

Ousted for being a human sympathizer, Prince Gavin has found himself in the belly of the Underground, a world where ghouls rule and werewolves fight to the death.
After learning of his parent’s murder, Gavin is called upon to endure the Rose Bound ceremony and claim his covens throne with a wife. Forces are rallying against him, some closer to home than he anticipates. Finding a murderer, leader of a coup, and himself proves to be a journey that will change him and his kingdom forever.

But when Gavin’s soulmate goes missing none of that matters. Nothing will stand in his way to find her, not even his own demons.