A Life In Blood by Martyn C. Miles

Deimos Black did not expect to get injured.

He also did not expect he would nearly die on his first solo mission.

But more than anything, he did not expect the woman who saved him to be another vampire.

Saved by someone he had been raised to view as his enemy, Deimos begins to realise that not everything he had been taught was accurate - and that perhaps, he had been on the wrong side of the war against vampires all along...