A Woman on Her Own — Jane Blackmore

Was it the hand of fate or that of her ailing father that wrote the cryptic letter bringing Shirley Williams back to her native village after six years in London? The conflict that had driven her away - between Jeff Armstrong and her stepbrother, Evan Jones - had started so long ago, when all three were children playing together. Now it seemed that the little girl had begun that the woman would bring to a climax.

With a difference - Shirley knew at last that it was Jeff she loved. Yet she married Evan....

And then Shirley's father died, and the evil she sensed in the old house became a tangible, pulsating entity, giving murder and madness a life of their own....