Rhyse Curtis & John Long 
Cromwell [EPUB ebook] 

Alexander Cromwell: He is the last of the royal family of the first vampires. Betrayed and left for dead, the centuries have turned him into a heartless creature. He cares for nothing and for no one, with one exception. Boulder: A creature of the earth made entirely of stone is the last of the first and most powerful elementals. He is Cromwells only friend and has waited patiently through the centuries for the vampire to return. Together, they coast through the centuries, revealing themselves to the world only when necessary to protect the humans from the supernatural races.