End of Days (Night Runner Novels)

Zachariah Thomson has spent the past year getting used to the idea that his best friend, Charlie, and the lovely Luna are now vampires, like him. As they learn to cope with the changes this brings, a mysterious creature appears. Likened to the Beast of the Apocalypse, it begins to dismantle the network of support around Zack, who discovers he is more than just an orphaned vampire he is the subject of an ancient prophecy that relates to the End of Days. As friends and enemies, old and new, throw his world into chaos, he is forced to re-examine what it means to be good at a time when it seems that only the strong and ruthless can survive.