Satan's Manor is a novel written by Mark Andrews. It was first published in 1977.
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DEVIL IN THE FLESH
Generations before, it had been one of the most elegant mansions in Georgia. Now it stood dark and decaying, possessed by a Satanic presence that defied anyone to disturb its brooding solitude.
Then the Hollywood movie company arrived there to make a horror picture, never knowing the terror they were about to encounter was far greater than anything in the script...
SATAN'S MANOR