Norman Franks is one of the worlds leading authorities on World War I fighter aviation, having published some of the seminal works on the subject. This is his fifth volume on World War I aces for Osprey, having written Albatros and Nieuport Aces in 1999, and Fokker Dr I aces (with Greg VanWyngarden) and American Aces of World War I in 2001. Greg VanWyngarden had had a lifelong interest in World War I aviation, and has been particularly active in deciphering the colours and markings that decorated the various German fighters flown by the leading aces. This is his second book for Osprey, having co-authored Fokker Dr I Aces with Norman Franks in 2001.