The Last Lords of Gardonal by William Gilbert
This lurid tale centers on two wealthy and morally corrupt brothers, Conrad and Herman, who rule as ruthless feudal barons from the Castle of Gardonal near the Italian Alps. The oppressed villagers, pushed to their limits by Conrad’s tyranny, seek the aid of a powerful sorcerer named Innominato after a series of heinous acts, including arson and kidnapping. Innominato, driven by his own motives, promises to oppose the baron and orchestrates a dark plan involving a vampire to exact justice.
