A collection of the best Agatha Christie detective novels, including The Crime Knocked on the Door (bestseller and most famous), Murder on the Blue Train.. for its cleverness, Lord Edgware Dies.. for its innovative plot, Murder in Mesopotamia.. for its unique setting, The Black Hand.. for its unconventional format, Appointment with Death.. as a wonderful standalone work, and The Early Cases of Poirot: for its touching ending. . . 15 of the most important, famous, and essential novels in the world. The price of a novel is 30 riyals, with a special discount for the complete collection. And God grants success...