Lynton and the Vampire at Tagatay Manor: Near the Volcano That Spewed Sorrow Rather Than Lava (Lynton Series) (Volume 4) 1st edition

Renowned demon and myth buster Lynton Viñas goes after a man who thinks he is history's most evil vampire, Ambrogio. He is on the prowl for blood and with the assistance of three people who think they are ancient Filipino were-bats called Aswangs, he is about to summon two ferocious demons from the deepest, darkest pit of hell to assure himself of another 1000 years of immortality. However, to do so he must offer a human sacrifice. Lynton is summoned to help the woman marked for sacrifice, and she must come to grips with people she at first thinks are just delusional, but as the mystery unravels, she begins to ask herself if there is some truth to the myth. Is this man really Ambrogio, and is he about to unleash horrendous fury on a small village nestled by a restless volcano?