Four booklets: No.1 Guardians of the Sky; No.2 Navies of the Nations; No.3 Armies of Today; No.4 Anti-Aircraft and Special Corps. London, Amalgamated Press. n.d. (presumed 1940). Each booklet 5x6", wrps, photo illus, 32pp. Pre-WWII publication designed to educated public on military issues. Fair-good; a few pages on one stuck together.