The following thesis tries to rescue the novels Sab and Dos mujeres, written by the XIX century writer Gertrudis Gómez de Avellaneda, from the hegemonic discourse offered by the contemporary critics. This is possible by comparing the Epistolar novel Tu amante ultrajada no puede ser tu amiga with the two novels analyzed. Also, this thesis examines the epistolary novel as a set of documents that creates a literary work on their own. That is to say, it studies how these letters, written to her lovers during the years 1839 to 1854, create an autobiographical fiction, a novel of the romantic period, and a character that makes a myth out of the writer and poet Gertrudis Gómez de Avellaneda.