Yehiel De-Nur (Hebrew: יחיאל די-נור; De-Nur means 'of the fire' in Aramaic; also Romanized Dinoor, Di-Nur), also known by his pen name Ka-Tsetnik 135633 (Hebrew: ק.צטניק), born Yehiel Feiner (16 May 1909 – 17 July 2001), was a Jewish writer and Holocaust survivor, whose books were inspired by his time as a prisoner in the Auschwitz concentration camp.

He wrote several works in Modern Hebrew about his experiences in the camp using his identity number at Auschwitz, Ka-Tsetnik 135633 (sometimes "K. Tzetnik").

In 1976, because of recurring nightmares and depression, De-Nur subjected himself to a form of psychedelic psychotherapy promoted by Dutch psychiatrist Jan Bastiaans expressly for concentration camp survivors.

[5] The book's title is derived from David's Psalms 16:8, (Hebrew: שִׁוִּ֬יתִי יְהֹוָ֣ה לְנֶגְדִּ֣י, romanized: Shiwwiṯi YHVH lənegdi tāmiddy[6]) "I am ever mindful of the LORD’s presence."

Tom Hurwitz, son of the TV producer showing the trial live at the time, was present during this testimony and recounts the collapse as a stroke.

[9] In an interview on 60 Minutes broadcast on 6 February 1983, De-Nur recounted the incident of his fainting at the Eichmann trial to host Mike Wallace.

"[10]In Hannah Arendt's book Eichmann in Jerusalem, the author implies that his fainting might have been due to the response of prosecutor Gideon Hausner and presiding judge Moshe Landau, who thought he detracted from the case at hand with the spectacular witness statement of his.

De-Nur wrote his first book about the Auschwitz experience, Salamandra, over two and a half weeks, while in a British army hospital in Italy in 1945.

[1] Among his most famous works was 1955's House of Dolls,[11] which described the Freudenabteilung "Joy Division", a Nazi system keeping Jewish women as sex slaves in concentration camps.

While De-Nur's books are still a part of the high-school curriculum, Na'ama Shik, a researcher at Yad Vashem, The Holocaust Martyrs' and Heroes' Remembrance Authority in Israel, has claimed that House of Dolls is a kind of pornographic fiction,[12] not least because sexual relations with Jews were strictly forbidden to all Aryan citizens of Nazi Germany.

[14] House of Dolls is at times pointed to as the inspiration behind the Nazi exploitation genre of serialized cheap paperbacks, known in Israel as Stalag fiction (סטאלגים).

[citation needed] The British post-punk band Joy Division derived its name from this book, which was quoted in their song "No Love Lost".