The Forbidden Territory
Author: Dennis Wheatley
Pictured above: Arrow Books – Paperback edition, published Sept. 1958
The Forbidden Territory was Dennis Wheatley’s first published novel. It was made into a film in 1934. Allegedly, Alfred Hitchcock bought the rights, but the film was directed by Phil Rosen.
You can read more about the film version at The Dennis Wheatley Project.