Cover illustrating a British plane chasing a German plane, with a map in the background, the British plane over England, the German plane over France, the English Channel in between, inscribed "Spot them in the Air!" above and "PUBLISHED BY THE DAILY MIRROR" below, the price "3d" (three pence) in both the lower left and right corners, the first page inscribed "Spot them in the Air! / Identification drawings and descriptions of twenty-seven British and German aircraft / Published by the Daily Mirror, Geraldine House, Rolls Buildings, Fetter Lane, London, E.C.4", pages two to four with a "Foreword by the "Daily Mirror" Aviation Correspondent", pages five through thirty-one illustrating seventeen British aircraft (Miles "Master", N. American "Harvard", Lockheed "Hudson", Hawker "Hurricane", Vickers Supermarine "Spitfire", Gloster "Gladiator", Blackburn "Skua", Fairey "Battle", Westland "Lysander", Armstrong-Whitworth "Whitley", Vickers "Wellington", Handley Page "Hampden", Bristol "Blenheim", Avron "Anson", Bristol "Bombay", Hawker "Henley", Short "Sunderland") and ten German aircraft (Messerschmitt 109, Heinkel 112, Messerschmitt 110, Junkers 87K, Junkers 88, Dornier 215, Junkers 86K, Heinkel 111K, Dornier Do 18K, Heinkel HE 115), with an Index and the inscription "Printed for the Publishers by H. CLARKE & Co (London) Ltd., R.C.I." on page thirty-two, cover printed in black and blue inks, on a white card stock, containing thirty-two pages printed in black ink on a white paper stock, 93 mm x 137 mm, dual-staple bound, extremely fine.