[EN]This dissertation aims to offer an analysis of the detective C. Auguste Dupin, the main character in the Dupin Trilogy, "The Murders in the Rue Morgue", "The Mystery of Marie Roget", and "The Purloined Letter", by exploring his power of reasoning in order to resolve mysteries. In addition, this study presents the relationship perceived between the detective and the reader, since their main purpose is to find a solution for the mysteries and murders. [ES]Este Trabajo de Fin de Grado tiene como objetivo final ofrecer un análisis del detective C. Auguste Dupin, el personaje principal de la Trilogía de Dupin de Edgar Allan Poe: "The Murder in the Rue Morgue", "The Mystery of Mari e Roget", y "The Purloined Letter", explorando su poder de razonamiento para resolver misterios. Además, este estudio presenta la relación que se percibe entre el detective y el lector, siendo su propósito principal encontrar solución a los misterios y asesinatos.
