MILITARY. – Ernst UDET. Ace of the Black Cross… translated from the German by Kenneth Kirkness. London: Newnes, [1937.] First U.K. edition, 8vo (182 x 119mm.) Photographic frontispiece. (Toning.) Original green cloth, gilt lettering to spine (slight staining to upper cover, wrinkling to lower cover). Note: the German fighter pilot with the most ‘victories’ to survive World War 1, Udet became a stunt pilot and light-aircraft manufacturer in the 1930’s, before joining the Nazi party. He was influential in the development of the Luftwaffe but killed himself in 1941. – And a further four related volumes (including Joseph Morris’ ‘The German Air Raids on Great Britain 1914-1918’, with 6 folding maps, [1925], 8vo, and ‘Vigilant’ [Claude W. Sykes]’s ‘German War Birds’, [1931], 8vo) (6).