Of course they thought he was crazy . . . . But Seymour Willis insisted his house was breathing and that he heard someone's - or something's - heartbeat pounding within the walls. So the disbelievers investigated, doubting the existence of ghosts or demons - until their reason was shattered by the shrieking unseen creature who threatened to claim their lives.

By then it was too late to stop the fiendish force from wreaking vengeance upon those denying its very existence. One by one, they must die - in exchange for its eternally evil soul.

Really enjoyed this re-read as I knew I would having read it before quite a few times!
Nearly 40 years old & it hasn't dated at all - though John's fashion sense made me smile "...dressed in (his) off white denim suit & red shirt... :o)