Back of book
A sleepy New Hampshire town fears it has been invaded by cratures of the devil. Always fascinated by the occult, Brian Creoghan remembers the waring he once read in an ancient book of sorcery:
THE PRINCE OF DRAKNESS WILL INHERIT THE EARTH
At first it seems preposterous. This is the 20th century.
And the "creatures of the devil" are only the MacArts, a strange brother and sister who share a curious old house.
But when cats are found burned as sacrifices, and a little girl is mysteriously killed, Brian decides to investigate. Not until he becomes dangerously involved in the MacArts sinister rites does he realize that he has been chosen by a supernatural power to prevent them from turning Earth into Hell.