The editor of Verlag Militaria published a recommendable book about the Prussian general Hans Ernst von Zieten, although also starting his career in a Hussar regiment not the famous Zieten of Frederic the Great.
The book contains the whole military history of the revolutionary and napoleonic wars with relation to Zieten, of whom only rare depictions are known. The book has lots of rare and interesting images, lots of them showing the evolution of the Prussian army (most of the images come from ASKB collection).
I wrote a review in German at http://www.napoleon-online.de/rezensionen_Bauer_Zieten.html and more information could be read at the English site of the editor (with some sample pages) at https://www.militaria.at/Book.aspx?book=21781760&Language=en
Greetings from Berlin
Thanks, a must, especially when written by my old friend Dr. Gerhard Bauer.