Mobile Software: The Mysterious Affair At Styles by Aghata Christie

Mr. Hastings returns wounded from the war and by chance gets an invitation to visit a friend's family estate, Styles Court. One of the family members mysteriously dies and foul play is suspected. Nearly everyone at Styles could have either a motive or a means for murder but fortunately Belgium's most celebrated detective, Hercule Poirot, is on hand to make sure the culprit doesn't escape. Agatha Christie's first Hercule Poirot novel keeps us guessing until the end.