Library of the World's Best Mystery and Detective Stories by Apuleius Alarcón, Pedro Antonio de Balzac, Honoré de Capuana, Luigi Erckmann-Chatrian Hawthorne, Julian Pliny, the Younger Mille, Pierre Voltaire Maupassant, Guy de Villiers de L'Isle-Adam, Auguste, comte de
 is a Project Gutenberg book, now on Github.