Crowood Aviation Series, Crowood Press, Marlborough, 1st ed., 2001. 192 pp., numerous photo-ills. D.j., 28 x 22cm. FINE. In the years prior to World War I, George Holt Thomas was an active supporter of aviation development and a tireless promoter of its military potential. When war arrived his Aircraft Manufacturing Company produced Farman designs under licence. The pace of development saw him employing a young and talented aircraft designer called Geoffrey de Havilland, and the aircraft they produced went on to make history. This book tells the full story of Airco, the Aircraft Manufacturing Company, and its superb range of products including the D.H.4 and D.H.9a designs that remained in service long after the war that inspired them ended.