Jacek Józef Dukaj (pronounced: [ˈjat͡sɛk ˈdukaj]; born 30 July 1974) is a Polish science fiction and fantasy writer. His fiction explores such themes as alternate history, alternative physics and logic, human nature, religion, the relationship between science and power, technological singularity, artificial intelligence, and transhumanism. He is regarded among the most popular Polish contemporary science fiction authors. He is the recipient of numerous national and international literary prizes including the European Union Prize for Literature, Janusz A. Zajdel Award and European Science Fiction Award. ()