The Tower Chronicles: Dreadstalker #5

Supernatural bounty hunter John Tower has long been a man shrouded in mystery. Now, discover what set him on this path of horror as his origins are finally uncovered, revealing just what Tower is risking his life to find! FBI agent Alicia Hardwicke comes to realize that John Tower is as supernatural as the creatures he battles to subdue. Despite his long life Tower is still at risk and he faces a formidable opponent! Meanwhile, Martin Castle and his clandestine organization moves with greater urgency to track Tower and steal any supernatural artifact he recovers.