The title is The Vampire's Curse, Book One of Things in the Night. I consider it to be a little on the dark side, but there's not a whole lot of sex. The heroine can kiss the cursed hero and cure him every night, so that he won't be a pale and pasty, blood hungry vampire, but a healthy looking human again, if that helps at all. I had another cover with a chest shot of the hero, but I no longer think that conveys the tone of the book.
Here is the synopsis of the book as well as the description of the hero and heroine:
She'll help him whether she wants to or not... In a city that cannot be found on any map that is inhabited entirely by witches, warlocks, vampires, and werewolves, Kyle McKane is seeking a cure for a curse that turns him into a blood hungry vampire during the night, and leaves him an exhausted, sleep deprived human during the day. Jackie Moore is probably the worst witch in the city apart from her ability to heal wounds and illnesses with a touch of her lips. She rarely sees outsiders and is stunned to come face to teeth with Kyle when he finally succumbs to his hunger and attempts to bite her. Instead she grabs him by the ears and kisses away his curse before he can sink his fangs into her. The problem is that the cure is only temporary until Kyle turns again the next night, and then goes out in search of Jackie so that she can help him, whether she wants to or not
Description of Heroine: Late twenties, slim with dark blond hair that had a slight curl to it, rose-pink lips and big blue eyes. She also wears box glasses, but it's all right if any photos of the heroine show her without them. She's not supermodel sexy like her sister is, but she has a good body, likes jeans and tank tops sort of girl, though it's cold and snowy during the book, so no summer images if possible
Description of the Hero: Black eyes, but still has the whites around them when he's in his vampire form. Blue-ish gray skin tone. When he's in his human form, his eyes are golden brown, strong jaw, dark brown hair, caucasian male, healthy appearance when he's not in vampire form.
I would very much love it if the heroine was shown kissing the hero on the cover, since that's her power and is a major part of the book, with maybe some effect showing that his skin is changing back from a dead blue-gray pasty color back to healthy human skin. I also love all kinds of purples and blue and smoke effects, which is a bit of what the original cover had as well. Maybe something that has a moon—or stars!—in the background because her kiss only helps him in the night.
I've attached the original image so that people can have a look, which I no longer feel conveys what the story is about, although I like the purple color