Berlin: Buchergilde Gutenberg, 1931. True first edition of the first in his series of "Jungle Novels." Text in German. Blue cloth boards stamped in red on front and spine; top edge orange. First issue with period at end of last line p.48 and chapter number on p.96 inverted [Treverton 577]. Spine slightly dulled and small spot on front board otherwise very good to near fine. Lacking dust jacket if issued in one.