Birthright (The Impavidus Cycle)

When a young daemon becomes host to his father, the eons-old progenitor of his kind, it seems his only purpose is to kill and kill again, to build a new world fit for the dark to rule. Unseen by humans, the world has long been controlled by the strings of a shadowy secret society of immortal beings, the Order of Azoth. As the organization fractures and begins to unravel, he may be the last hope of the Order to quell the spread of corruption and change the path of the future. Just as they may be his only hope to discover his own humanity.