Here's a more recent (and non-raving monarchist) biography of Ungern-Sternberg by British historian James Palmer, "The Bloody White Baron": https://www.amazon.

Here's a more recent (and non-raving monarchist) biography of Ungern-Sternberg by British historian James Palmer, "The Bloody White Baron": https://www.amazon.com/Bloody-White-Baron-Extraordinary-Nobleman/dp/0465014488/ https://www.amazon.com/Bloody-White-Baron-Extraordinary-Nobl...