This volume comprises two collections of short stories of Leopoldo Lugones: Stranger Forces (Las Fuerzas Extrañas) and Fatal Tales (Cuentos Fatales). Strange Forces was published in 1906, although most of the twelve stories that it contains were published previously in different newspapers, between 1897 and 1906. They are fantastic stories that mix scientific elements with biblical and legendary myths, combining erudition, irony and fantasy in an unlikely mixture. We have included all twelve stories of that volume, with the exception of the Essay on a Cosmogony in Ten Lessons, which forms the second part of the original publication. Fatal Tales was published in 1924, it gathers five stories that appeared in the newspaper La Nación between 1923 and 1924. All stories share the common note indicated by the adjective of the title: 'fatality', as an inescapable force that seems to determine actions and defines the final outcome.