The Adventure of the Red Circle by Arthur Conan Doyle: "The Adventure of the Red Circle" is one of Arthur Conan Doyle's famous Sherlock Holmes detective stories. In this tale, Holmes and Watson are presented with a mysterious case involving a coded message and a secretive organization.

Key Aspects of the Detective Story "The Adventure of the Red Circle":
Sherlock Holmes: The story features the iconic detective Sherlock Holmes, known for his deductive reasoning and keen observation.
Mystery and Intrigue: Arthur Conan Doyle weaves a complex and engaging mystery, keeping readers on the edge of their seats.
Codebreaking and Investigation: "The Adventure of the Red Circle" may involve codebreaking elements as Holmes and Watson work to unravel the secrets of the red circle.

Arthur Conan Doyle (1859-1930) was a British author best known for creating the fictional detective Sherlock Holmes. His stories have had a lasting impact on the detective fiction genre, and "The Adventure of the Red Circle" is a testament to his storytelling prowess.