Angel Souls and Devil Hearts — Christopher Golden

The Gospel of Shadows has been lost, and the existence of vampires has been revealed. Peter Octavian is trapped in Hell, but he has given his allies a mission to discover the secret origin of vampires.

Once they were legend. But now the entire world knows the truth about their nature, their powers...and their weaknesses. Everything they have fought for centuries to hold on to, including their mortal loves, is in danger. For human prejudice can be the most powerful evil of all.

The war has begun...