Who wrote "Murder on the Orient Express"?

"Murder on the Orient Express" is a detective novel by British writer Agatha Christie featuring the Belgian detective Hercule Poirot. It was first published in the United Kingdom by the Collins Crime Club on 1 January 1934. In the United States, it was published on 28 February 1934, under the title of Murder in the Calais Coach, by Dodd, Mead and Company. The UK edition retailed at seven shillings and sixpence (7/6) and the U.S. edition at $2.00.

The elegant train of the 1930s, the Orient Express, is stopped by heavy snowfall, with many passengers. A murder is discovered, and Poirot's trip home to London from the Middle East is interrupted to solve the murder.

The US title of Murder in the Calais Coach was used to avoid confusion with the 1932 Graham Greene novel Stamboul Train which had been published in the United States as Orient Express.

Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE (née Miller; 15 September 1890 – 12 January 1976) was an English writer. She is known for her 66 detective novels and 14 short story collections, particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple. Christie also wrote the world's longest-running play, a murder mystery, The Mousetrap, and, under the pen name Mary Westmacott, six romances. In 1971 she was appointed a Dame Commander of the Order of the British Empire (DBE) for her contribution to literature.