Blood Lovers

The prophecy says that a pure half blood will defeat the ancient villain of the world. When Andrea meets Shane, she doesn't realize that her life will drastically change. For starters, he kidnaps her from her mundane life to go traipsing around the world with him. At first, she despises him, but as they venture further and further into the vampire world, she is forced to trust him.
Andrea is unlike any other woman he's ever seen. She's beautiful, strong, and independent. As he discovers more of the secrets she has kept hidden, he finds that she is a drug and he is her addict. As they go about their travels, he discovers that she stirs so many emotions in him, the strongest of which is love.
To defeat an ancient villain who taunts Andrea relentlessly, they must learn to trust each other. Their survival and their sanity depend on it.