These volumes discuss and illustrate the worldâs first all-metal airplanes, including the development of their all-metal structural technology as well as the aircraft themselves. Numerous photographs and contemporary drawings are included, and each volume includes scale drawings of three aircraft types. These volumes provide the most detailed and complete coverage of these aircraft ever published. Volume 1 has 356 photographs, including 82 in color, and color profiles of 13 aircraft. Volume 2 has 229 photographs, including 30 in color, and color profiles of 14 aircraft. It also includes 7 color images illustrating factory colors and markings.