A Study in Scarlet is an 1887 detective novel written by Arthur Conan Doyle. The story marks the first appearance of Sherlock Holmes and Dr. Watson, who would become the most famous detective duo in popular fiction.
Sir Arthur Ignatius Conan Doyle KStJ DL was a British writer and medical doctor. He created the character Sherlock Holmes in 1887 when he published A Study in Scarlet, the first of four novels and more than fifty short stories about Holmes and Dr. Watson.