Misguided (Book 5 of 9)by Melissa De la Cruz

After inheriting the dark Van Alen Legacy, Schuyler fled to Florence--with her forbidden love, Jack. Now the two of them must embark on the mission Schuyler was destined to complete: to find and protect the seven gates that guard earth from Lucifer, lord of the Silverbloods. As the Blue Blood enclave weakens yet further, fate leads Schuyler closer to a terrifying crossroads--and a choice that will determine the destiny of all vampires.