The Adventure of the Blue Carbuncle

The Adventure of the Blue Carbuncle is a detective short story by Arthur Conan Doyle, first published in 1892. It is one of the Sherlock Holmes stories and appears in The Adventures of Sherlock Holmes. The story centers on a case built around a valuable gem and the kind of close observation, deduction, and careful questioning that define Holmes at work.

It is a good fit for readers who want a short, tightly constructed mystery rather than a long novel. It also works well as an entry point into Holmes for anyone who wants a single case before moving on to the larger series. What stands out here is the classic Holmes setup: an apparently ordinary incident, small details that matter, and a solution that comes from connecting them rather than from action-heavy scenes.