This book by David G. Marwell is published in German. The German title: Mengele- Biografie eines Massenmörder I could not find any translation in Google Germany. The author added some hair raising details I had no clue about it yet. If there is no translation available, please tell me. Stefan.
https://www.amazon.co.uk/Mengele-Unmasking-David-G-Marwell/dp/0393609537 https://www.amazon.de/David-G-Marwell/e/B083M4SCH8?ref=sr_ntt_srch_lnk_4&qid=1633381708&sr=1-4