EN
In 2018, the third opera composition by Aleksander Nowak (*1979), ahat ilī – Sister of Gods had its premiere., The libretto was created by Polish Nobel Prize winner Olga Tokarczuk, on the basis of her own novel. This kind of combination of literature and opera, reinforced by the unique situation in which the author of the text-inspiration and the libretto is the same person, suggests that the work should be defined as a literary opera. The aim of the article is to present the composition in terms of its genres as well as to show the unique path of its content from literary work to operatic, together with the analysis of the libretto from the librettological perspective.