Bombers, The World Encyclopedia of: An illustrated history from the early planes of World War 1 to today's sophisticated jet bombers

The World Encyclopedia of Bombers: An Illustrated History from the Early Planes of World War 1 to the Sophisticated Jet Bombers of the Modern Age

The World Encyclopedia of Fighter Aircraft: An Illustrated History from the Early Planes of World War I to the Supersonic Jets of Today

The Illustrated Encyclopedia of Military Helicopters: A Guide to Over 80 Years of Rotorcraft, from the First Types Deployed in World War II to the Specialized Aircraft in Service Today