Sleep No More — Margaret Erskine

The clan had gathered to celebrate glamorous Loretta Stourbridge's marriage -- her third. It was important to all of them that the ceremony go off without a hitch, and especially so to Loretta, for there was a great deal of money involved.

But suddenly everything went wrong; Loretta could almost see her castles in the air dissolving into puffs of mist, and her future security along with it.

Even then there was a chance she'd come out ahead -- until one of them was murdered -- by a seemingly headless monster. From then on no one was safe -- not Loretta, not the family, not anyone in the old house.

But the long arm of coincidence beckoned, and Inspector Septimus Finch stepped in. Only then, in a surprising twist of Fate, was a diabolical murderer found out.