A Study in Scarlet

A Study in Scarlet is a detective mystery novel written by Scottish author Sir Arthur Conan Doyle, which was first published in 1887. It is the first story to feature the character of Sherlock Holmes, who would later become one of the most famous literary detective characters, with long-lasting interest and appeal.
In A Study in Scarlet , Holmes and Watson's first mystery, the pair are summoned to a south London house where they find a dead man whose contorted face is a twisted mask of horror.