Angel Of Death by Hermione Stark

My name is Diana Bellona and I am the Angel of Death.
Except I can’t be, because the Angel of Death isn’t human, and couldn’t possibly be a helpless girl kept imprisoned by her cruel adoptive family for years. The only thing I’m sure about is that the deaths I dream of always come true.
And now I have dreamt of the murder of Xander Daxx, an angelus who is about to marry an English princess. A murder which could spark war between humans and otherkind. I risk everything to escape, only to arrive at a castle with a royal engagement party in full swing, where no one wants to believe me. Worse, I find myself falling for Xander’s long-time nemesis, the mysterious Constantine Storm with his dangerous past.
I don’t even know if an Angel of Death is supposed to save people. But I must, because the closer I get to the killer, the closer the killer is getting to me.