Goddess of the Night

Vanessa is being followed. She doesn't know by whom, and she doesn't know what they want. But she knows why. Vanessa has a secret. She can become invisible, but the problem is, she can't control it. And her worst fear is being discovered. Only her best friend, Catty, knows, and Catty is different as well. She can travel back in time -- and take Vanessa with her.