Jane Marple, usually referred to as Miss Marple, is a fictional character appearing in 12 of Agatha Christie's crime novels and in 20 short stories. Miss Marple is an elderly spinster who lives in the village of St. Mary Mead and acts as an amateur detective. Alongside Hercule Poirot, she is one of the most loved and famous of Christie's characters and has been portrayed numerous times on screen.

Her first appearance was in a short story published in The Sketch magazine in 1926, "The Tuesday Night Club", which later became the first chapter of The Thirteen Problems (1932). Her first appearance in a full-length novel was in The Murder at the Vicarage in 1930.

(Source: Wikipedia)