Purple magic.

After her friend Carrie vanishes into the hedonistic world of Manhattan's forbidden clubs, Jolene Morrison is willing to do anything to find her. And it may come to that when she seeks the help of the vampire Drago. Jolene may be half vampire and free from their manipulations but the instant flourishing desire the mere presence of Drago stirs within her is undeniable. And Drago can smell it. He can practically taste her emotions, her lust. He knows their attraction is real, and he must have her. But Drago also knows what could happen to Jolene if she were to enter one of those clubs. The thought of another vampire having her drives him wild. Now Drago must do anything to protect her or risk losing the woman who just might be his mate.