Moonlight Warrior by Janet Chapman

Eve Anderson is darned tired of Kenzie Gregor meddling in her business. She might be struggling to keep herself and her ailing mother financially afloat, but she’s no princess in need of a strong, capable knight in a black SUV to rescue her — even if he is easy on the eyes. Besides, there’s something very odd about him…and she’s sure the strange events occurring in their small coastal Maine town are linked to his recent arrival.
Once an immortal warrior cursed to live as a panther, Kenzie is finally free to live and die as a man, and his destiny is to help other displaced souls. Of course, if he can get tiny, blue-eyed, curly blond Eve out of the deal, well…life doesn’t get any better. But she’s as stubborn and fierce as a lioness, and in order to win her love, he must tempt her with forbidden desires….