The first year of Bachillerato (typically students aged 16–17) is characterized by a significant increase in academic rigor. Unlike the ESO years, which focus on general competencies, Bachillerato is distinct in its specific preparation for higher education and professional life. Within this context, the textbook Lengua y Literatura 1º Bachillerato by San Sy is not merely a repository of information but a didactic guide designed to navigate the complexities of the Spanish language and its literary tradition.