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