The Spiral Staircase

As Professor Sebastian Warren battens down the shutters and locks all the doors of their isolated country house, the eight occupants start to feel safe. Somewhere outside lurks a murderer of young girls, the latest only an earshot away. Is there really safety in numbers and what happens when their numbers start to dwindle? The novel was adapted for a radio production starring Helen Hayes, and in 1946 director Robert Siodmak took it to the big screen, under the title The Spiral Staircase.