Sänger: Germany's Orbital Rocket Bomber in World War IIHardcover, 21 January 2002

Eugen Sänger's proposed manned, bi-fuel, liquid rocket-powered orbital bomber was truly mid-1940s high tech. The world's first intercontinental bomber project, the Sänger orbital bomber's total flight time was expected to be no more than two hours. Fascinating stuff. The complete story is told here for the first time.