Sofía Balbuena has shared her experience as a writer in Iowa, where she felt underestimated as a Spanish-language author. This realization had a profound impact on her perspective. Her work, 'Personaje secundario', delves into the various stages of life experienced by women, exploring their stories and journeys.

The book is a collection of relatos, or accounts, that examine female life stages. Further details about Sofía Balbuena and her work can be found in the original article from El País, which provides more insight into her writing and experiences.