House of Shadows: Enchantment in Crimson:

2005 WINNER OF THE RIO AWARD OF EXCELLENCE. AN EROTIC MUST READ!! Caught in a power struggle between two vampires, Rowan must use her wit and her witchcraft to keep the older more powerful vampire Klaus, from making a snack out of the far younger Rick while fending off the younger vampire's amorous intent. And then there's the Bad-Guys.