These three books are handy reference sources. Each is over 300 pages and are in three stages. Origins to WWI, 1918 to 1935 and 1945 to 1960. Each has specifications, text, usually three views and a colour rendition. Numerous of the aircraft are quite rare and so worthwhile. Examples of many would be the Russian Lebed'12 a nice looking two seater reconnaisance. The Zeppelin Staaken E4/20 which was a monoplane 4 engine civil transport and many others. Good condition and post at cost. Price is for all three.