The Sign of Four was the second novel featuring which famous fictional detective, following A Study In Scarlet?
Arthur Conan Doyle Sir Arthur Ignatius Conan Doyle KStJ, DL (22 May 1859 – 7 July 1930) was a British writer best known for his detective fiction featuring the character Sherlock Holmes. Originally a physician, in 1887 he published "A Study in Scarlet", the first of four novels about Holmes and Dr. Watson. In addition, Doyle wrote over fifty short stories featuring the famous detective.
The Bishop Murder Case The Bishop Murder Case (1928) is the fourth in a series of mystery novels by S. S. Van Dine about fictional detective Philo Vance. The detective solves a mystery built around a nursery rhyme. "The Bishop Murder Case" is believed to be the first nursery-rhyme mystery book.