A Bolivian writer in the thirty's - forgotten until the 90's - Hilda Mundy became known especially at the end of the Chaco War (1932-1935) and in the immediate post-War period as a humouristic columnist in Oruro, the town where she was born. All her columns are instances of a literature of manners, on which she turns a critical and satirical eye. Her remarks on hypocritical and sanctimonious moral standards of her time are particularly scathing. Hilda Mundy's texts satirize the powerful and target the faults and scandals of political life, and the rise of militarism which was looming at the end of the war. This marked the destiny of the writer under the sign of censure. Her only book, Pirotecnia, ensayo miedoso de literatura ultraista, published in La Paz in 1936 remains loyal to this type of writing, favouring short texts and focused on deconsecration of power symbols. The themes of the modern city, of technology, games and gambling and the attack on tradition, which are also present in her press articles, made up the avant-Garde universe of Pirotecnia. Movement and mistrust are at the heart of this modern literature, which is written in the first person. The self of Hilda Mundy's writing is enriched by its heteronymy and continues a poetic project related to an aesthetics of scenic arts, where the most important mask is that of language.