Hissing by Skyler Snow

The city of Detroit is home to more than Humans. Shifters, vampires, and creatures unknown stalk the streets. One of those creatures is Ronin, a vampire on a mission.
It’s just his luck he runs across the rambling, determined, sometimes foolish omega human, Ari. He wants Ari out of his hair, but the omega has big goals. If he wants to move up as a journalist, he needs to crack this case and write about it.
Neither of them expects that they have more in common than they think. Once enemies, they have to work together if they’re going to keep the people of Detroit safe. Can they work out their differences and listen to the fated thread that connects them?