Mike Lynch 
The Vampires of Lower Bennett Street [EPUB ebook] 

The Immortal Lazarus is on a quest to find an ancient artefact that will grant him the one thing he seeks most in life, death. After finding the artefact in Northern Ireland he is ambushed and along with his immortal cohorts, a group of vampires, he is trapped for centuries underground. He emerges in a totalitarian future, one where vampires now rule. Hunted by monsters old and new, Lazarus sets out to uncover the mysteries of this new world and find the redemption that he so desperately seeks.