[4][5] In 1944, he married Ewa Łomnicka and moved to Kraków,[2][5] where he lived in the famous Literary House [pl] at 22 Krupnicza Street.

[2][6] In 1953, he joined the Polish United Workers' Party,[8] and in the same year, he became a member of the editorial board of Przegląd Kulturalny, where he was a co-editor until 1963.

They had one daughter, Irena (1954–2021), the prototype for Iki from the novel Wielka, większa i największa (The Great, Greater, and Greatest), a doctor of mathematics and artist from Piwnica pod Baranami.

[3] He made his debut in 1945 as a music critic[3][10] and simultaneously as a writer with the short story Monika, published in the weekly Odrodzenie (No.

[2] Another significant work was the repeatedly reissued novel Kształt miłości (The Shape of Love) about Frédéric Chopin,[3] for which he received the State Award of the 2nd degree in 1951.

[6] Notably, Wielka, większa i największa (The Great, Greater, and Greatest) from 1960 received high praise from critics[11] and became a compulsory reading book for fifth grade.

[12][13] According to Frycie, in his works for young adults, Broszkiewicz exposed moral values such as resourcefulness, wisdom, nobility, and courage, and combined various narrative techniques, genres, and literary conventions.

[5] Broszkiewicz's works have been translated into at least 20 languages, and the total print run of his novels exceeded 1 million copies.

According to Dariusz Rosiak [pl], Broszkiewicz was even their actual undisclosed author based on Sat-Okh's stories.

[16] They had a daughter, Irena Broszkiewicz (1954–2021), a mathematician associated with Piotr Ferster [pl], the director of Piwnica pod Baranami.