Detective fiction

Detective fiction is a subgenre of crime fiction and mystery fiction in which an investigator or a detective—whether professional, amateur or retired—investigates a crime, often murder. The detective genre began around the same time as speculative fiction and other genre fiction in the mid-nineteenth century and has remained extremely popular, particularly in novels. Some of the most famous heroes of detective fiction include C. Auguste Dupin, Sherlock Holmes, Kogoro Akechi, Miss Marple and Hercule Poirot. Juvenile stories featuring The Hardy Boys, Nancy Drew, and The Boxcar Children have also remained in print for several decades.

Some scholars, such as R. H. Pfeiffer, have suggested that certain ancient and religious texts bear similarities to what would later be called detective fiction. In the Old Testament story of Susanna and the Elders (the Protestant Bible locates this story within the apocrypha), the account told by two witnesses broke down when Daniel cross-examines them. In response, author Julian Symons has argued that "those who search for fragments of detection in the Bible and Herodotus are looking only for puzzles" and that these puzzles are not detective stories.

One Thousand and One Nights contains several of the earliest detective stories, anticipating modern detective fiction. The oldest known example of a detective story is "The Three Apples", one of the tales narrated by Scheherazade in the One Thousand and One Nights (Arabian Nights). In this story, a fisherman discovers a heavy, locked chest along the Tigris river, which he then sells to the Abbasid Caliph, Harun al-Rashid. When Harun breaks open the chest, he discovers the body of a young woman who has been cut into pieces. Harun then orders his vizier, Ja'far ibn Yahya, to solve the crime and to find the murderer within three days, or be executed if he fails in his assignment. Suspense is generated through multiple plot twists that occur as the story progresses. With these characteristics this may be considered an archetype for detective fiction. It anticipates the use of reverse chronology in modern detective fiction, where the story begins with a crime before presenting a gradual reconstruction of the past.

The main difference between Ja'far ("The Three Apples") and later fictional detectives, such as Sherlock Holmes and Hercule Poirot, is that Ja'far has no desire to solve the case. The whodunit mystery is solved when the murderer himself confesses his crime. This in turn leads to another assignment in which Ja'far has to find the culprit who instigated the murder within three days or else be executed. Ja'far again fails to find the culprit before the deadline, but owing to chance, he discovers a key item. In the end, he manages to solve the case through reasoning in order to prevent his own execution.

On the other hand, two other Arabian Nights stories, "The Merchant and the Thief" and "Ali Khwaja", contain two of the earliest fictional detectives, who uncover clues and present evidence to catch or convict a criminal known to the audience, with the story unfolding in normal chronology and the criminal already known to the audience. The latter involves a climax where the titular detective protagonist Ali Khwaja presents evidence from expert witnesses in a court.

Gong'an fiction (公案小说, literally："case records of a public law court") is an early genre of Chinese detective fiction.

Some well-known stories include the Yuan dynasty story Circle of Chalk (Chinese: 灰闌記), the Ming dynasty story collection Bao Gong An (Chinese: 包公案) and the 18th century Di Gong An (Chinese: 狄公案) story collection. The latter was translated into English as Celebrated Cases of Judge Dee by Dutch sinologist Robert Van Gulik, who then used the style and characters to write the original Judge Dee series.

The hero/detective of these novels was typically a traditional judge or similar official based on historical personages such as Judge Bao (Bao Qingtian) or Judge Dee (Di Renjie). Although the historical characters may have lived in an earlier period (such as the Song or Tang dynasty) most stories are written in the later Ming or Qing dynasty period.