New York: Grosset & Dunlap, (1947). Later printing, ca 1950. vi, , 216 pp. Frontis. 12mo. Textured brown cloth binding with dark brown lettering. Orange pictorial eps. Color pictorial wraparound dust jacket. VG+ (slight lean)/VG+ (modest wear). Item #5444.4
Front flap series advert lists through "Secret of the Lost Tunnel"