The Darkness at Mantia — Iris Barry

Adrift after a crippling love affair, Heather Ardrey accepts a position as secretary to Dr. Ranson Daventry, a famed neurologist who is just returning to his practice after a mysterious absence. Initially, the position could not be more enchanting - the splendid fortress-like mansion, the wild natural splendor of the Pacific river valley, the amiable company of Dr. Daventry and his family. But, unexpectedly and mercilessly, the sunlight ebbs and gives way to darkness. There is an angel of death presiding over the premises, and it is none other than the doctor's beautiful but belated bride!