2 books
The Secrets of Potsdam: A Startling Exposure of the Inner Life of the Courts of the Kaiser and Crown-Prince; Revealed for the First Time (Classic Reprint)
The Secrets of Potsdam; A Startling Exposure of the Inner Life of the Courts of the Kaiser and Crown-Prince Revealed for the First Time by Count Ernst Von Heltzendorff, Commander of the Order of the Black Eagle, & C., Late Personal-Adjutant to the German