He has written several books, among them the poetry collection Papelera de reciclaje, novels such as ¿Sueñan los gauchoides con ñandúes eléctricos?
and Ascenso y apogeo del imperio argentino, and essays compiled in the volume Tecnología y barbarie.
His prose work often deals with science fiction, speculative genres, and the Argentine historical and literary tradition, a blend dubbed gaucho-punk.
In 2021, Nieva was named by Granta magazine as one of the best young writers in the Spanish language.
[2] [3] His short story Dengue boy, published on that magazine, won the O. Henry Award in 2022; the following year, it was further developed into the novel La infancia del mundo.