A resident of Leesburg, Virginia, Jon Guttman is research director and contributing writer for Weider History Publications. Specialising in World War 1 aviation, he has written 19 titles in the past, including Balloon Buster Aces of World War 1 in the Osprey Aces series. Harry Dempsey has been passionate about World War 1 aviation for more than 30 years, resulting in the production of some of the most technically accurate artwork on the subject for Osprey's Aircraft of the Aces series. He has illustrated a vast number of World War 1 titles in Osprey's ever-growing range of best-selling aviation titles.