The book describes unusual aircraft schemes, which include: disc-like devices, "flying wings," aerospace vehicles, tiltrotor aircraft, lighter-than-air high-altitude vehicles, unmanned vehicles, "flying platforms," etc. Brief information about the appearance of the first reports of UFOs is given, a true history of the development of unusual aircraft in Germany during World War II is given, as well as in the post-war period in the USA, Canada, France and the USSR. The book is equipped with a large number of drawings and photographs.