Murder in Mesopotamia.

First published in the United Kingdom by the Collins Crime Club on July 6, 1936, Murder in Mesopotamia follows Belgian detective Hercule Poirot's investigation into a diabolical murder committed by one of the members of an archeological excavation in search of the ancient ruins of Mesopotamia. Upon publication, in The New York Times Book Review, Kay Irvin remarked: "Agatha Christie is a past master, as every one knows, in presenting us with a full assortment of clues which we cannot read. And there are mysteries within mysteries among this quiet yet oddly troubled group of scientific workers, one of whom must have been the murderer; it is part of the author's skill to make us feel that every human character is a little mysterious, and that when crimes are committed among a group of apparently well-bred and cultivated people every one of them may be suspect."