Recommended reading - Some Must Watch, by Ethel Lina White (1933):

Some Must Watch

By Ethel Lina White.

Filmed as The Spiral Staircase (1946), directed by Robert Siodmak.

Paperback.

Published by Hinkler Books.

First published 1933.

ISBN 13: 9781743081167

ISBN10: 1743081162

ASIN: 1743081162

Description:

Film director Robert Siodmak took Some Must Watch as the inspiration for his classic, bone-chilling thriller, The Spiral Staircase. In this novel Helen Capel takes the position of lady-help in a remote country house owned by the Warren family. She learns that a murderer is on the loose. All four of his victims were young girls, and the last of these was strangled in a lonely house just five miles away. Helen feels safe inside the house, protected, but the maniac is closer than she fears.

Born on this day – Ethel Lina White:

Ethel Lina White

Writer

April 2, 1876 – August 13, 1944

Credits:

Books:

The Wish-Bone (1927); Twill Soon Be Dark (1929); The Eternal Journey (1930); Put Out the Light (aka Sinister Light) (1931); Fear Stalks the Village (1932); The Spiral Staircase (aka Some Must Watch) (1933); The First Time He Died (1935); Wax (1935); The Wheel Spins (aka The Lady Vanishes) (1936); The Third Eye (1937); The Elephant Never Forgets (1938); Step in the Dark (1939); While She Sleeps! (1940); She Faded into Air (1941); Midnight House (aka The Unseen / Her Heart in Her Throat (1942); The Man Who Loved Lions (aka The Man Who Was Not There (1943); They See in Darkness (1944); Lethal Ladies (2004); The Lady Vanishes / The Spiral Staircase (2015).

Movies and television:

The Lady Vanishes (2013); The Spiral Staircase (2000); Alfred Hitchcock Presents / An Unlocked Window (1985); The Lady Vanishes (1979); The Spiral Staircase (1975); Detective (1969); The Alfred Hitchcock Hour (1965); The Spiral Staircase (1961); The Spiral Staircase (1946); The Unseen (1945); The Lady Vanishes (1938).