Ka-tzetnik 135633

Yehiel De-Nur, known by his pen name Ka-tzetnik 135633, was a Holocaust survivor and author. He is known for his works that depict the horrors of the Holocaust, drawing from his own experiences as a prisoner in Auschwitz. His pen name, Ka-tzetnik, is derived from the Yiddish slang for a concentration camp inmate, and the number 135633 was his prisoner number at Auschwitz.