This book includes and describes the major fighter and bomber proposals from the American aircraft industry for the period roughly 1937-1945. These embrace various fighter and interceptor concepts, medium, heavy and intercontinental bombers, attack aircraft and anti-submarine aircraft, both for the USAAF and US Navy. Particular emphasis is placed on 'Circular Proposals' - a system of submitting designs against requirements circulated around industry by the Army Air Force in the 1930s and early 1940s. The illustrations show drawings and photographs of unbuilt designs merged with the history and photographs of real aeroplanes. Very little has been published previously about American projects from this time period and much of the material will not have been seen widely before. It will therefore be fascinating reading for all lovers of the previously highly successful 'Secret Projects' series and aviation historians.