Putnam, 2nd imp. 1969. Viii + 742 pp., 645 photo-ills., & the occasional ill. Green cloth ; gilt tooling to spine ; 28 x 22cm. Some typical light marking to covers o/w internally very clean & V.G. The most substantial of all the Putnam titles, this book records all the British aeroplanes known to the author which flew or were designed during the First World War years. It therefore includes notes on several types which were designed before the war and others which did not fly until after the Armistice. Specifications and a history are given for each aeroplane and this outstanding work contains no less than 645 illustrations, the vast majority of which are photographs together with the occasional diagram. As with all Putnam titles, every effort has been made to achieve the highest possible degree of accuracy and this book remains, today, an essential and definitive reference of First World War aviation.