Who made whodunit?

The term "whodunit" refers to a genre of mystery fiction that focuses on the solution of a crime, typically a murder. It is often attributed to early 20th-century authors, with Agatha Christie being one of the most famous practitioners of the genre. However, the roots of the whodunit can be traced back to earlier writers like Edgar Allan Poe and Arthur Conan Doyle, who laid the groundwork for detective fiction. The genre has since evolved, but its hallmark remains the central mystery of "who did it?"