- Noted military aviation expert Colin Owers presents the most comprehensive work ever compiled on the great De Havilland aircraft of World War I. The second volume in this two-book set contains the most complete story of the little-known D.H.6, plus much new information on the rest of the De Havilland aircraft line. More than 140 photos, all-new drawings and 8 x 12-inch fold-outs, and 40 four-color profiles, including the first drawings of the D.H.11, round out this definitive book.