Group of four (4) German fighter pilot/Luftwaffe related books, including: Red Baron book, by Manfred Freiherr von Richthofen, published by German Publishing House, Berlin in 1933, 7 3/4" x 5"; "Molders und Seine Manner" book by Fritz von Forell, published 1941; "Ernst Udet" by Mein Fliegerleben, published 1935; "In der Luft unbesiegt" by Lehmanns, published 1923. All owned by Hans Klein, WWI German ace and WWII Major General. Provenance: From a Santa Barbara, California estate.