Edgar Wallace (1875–1932) was an English writer, playwright, screenwriter, and journalist. A contemporary of Arthur Conan Doyle, he surpassed in his time the popularity of the creator of none other than Sherlock Holmes himself. Edgar Wallace is one of the best-known English authors of the detective genre.
The novel is written in the painstaking manner typical of English authors: a meticulous examination of motives and methods used to reveal a crime.