The Dark Gateway — John Burke

The ancient, sinister castle located in the isolated Welsh countryside is no mere heap of dead stones. It quivers with an evil life of its own. Sinister powers are reaching through the castle gateway from somewhere out beyond--evil, menacing Old Gods that had once been thrust out of the world, but now clamor to return. The stranger who appears at the nearby farm on the hillside isn't coming to fulfill Nora's romantic dreams--he's got his own part to play in the recall of those Dark Ones. And he's not the only person in her life who's not what they seem: the Powers of Darkness are rapidly approaching this lonely corner of Wales. The human race is at risk--with control the earth part of the stakes. Who will oppose the seemingly invincible invaders--and who, in this frightened little community, can possibly be trusted? A classic horror novel in the H.P. Lovecraft tradition!