New York: Grosset & Dunlap, 1936. Gretter, J. [Joseph] Clemens. Hard Cover. Very Good / Good. Item #2312200
Front jacket flap loosening from joint but still holding, jacket edges rubbed, jacket reverse mended with tape. Page ridges rubbed, ink name and address on FFE.
iii, 211 pp. Jacket art and endpapers by Joseph Clemens Gretter, who here and in other works (most notably Hardy Boys novels) used the name Gretta. "Irrepressible Jimmy and his pal Pooch Mallory are assigned duty as observers on blimps, and get into all the scrapes their fertile minds can invent until the climax when they capture a German spy."