Is the novel of a detective investigation by Agatha Christie, published in 1936 and later in the United States later in the same year. It is the greatest success of the world literature, and has left a great imprint in the history of detective novels. It revolves around a criminal who walks his way to his victims According to the alphabetical order of their names, a challenge to the power of Buaro the superhero, but Buaro soon discovered that this maniac committed his crimes for another purpose.