The Wheel Spins

"Adept at laying one icy finger on the back of your neck" - Spectator
Iris Carr, a beautiful, young socialite on her way back home on a train to England after vacationing in the mountains of central Europe. Afraid while travelling alone, she befriends Miss Froy, who suddenly disappears without a trace. No one on the train believes that Miss Foy is missing and what's more they don't see to believe that she even existed.
A 'Girl on a Train' meets a 'Locked room' mystery, Ethel Lina White's The Wheel Spins was first published in 1936. It was adapted by Sidney Gilliat and Frank Launder and then filmed three times, most notably by Alfred Hitchcock as The Lady Vanishes (1938).

Ethel Lina White was born in Abergavenny in Wales. White began early contributing essays and poems to children's papers while a child herself. She then moved to short stories, several years later to full length books. Her first three, published between 1927 and 1930, were general fiction. Her first crime novel, published in 1931, was Put Out the Light, and she went on to be one of the best-known crime writers of the 1930s and 1940s in Britain and the US. Her novel The Wheel Spins (1936) was made into the acclaimed film, The Lady Vanishes, by Alfred Hitchcock.