Author of Feldpost: the War Letters of Friedrich Reiner Niemann, Denis Havel graduated from Eastern Illinois University with a degree in Psychology. He has worked in a wide range of occupations, from gravedigger to teacher to Wall Street investor. An authority of Prussian-German military, his other fields of study include early Germanic languages, literature, and culture. He is active in various German-American organizations that preserve the German language, culture, and traditions.