Featuring unique material from the members of the Detroit Rocket Societymany of whom are regarded as the fathers of modern rocketrythis collection offers a privileged glimpse at an obscure rarity of rocket history. More than 50 years out of print, the important technical papers of Professor Hermann Oberth, Krafft Ehricke, Eugen Sänger, Heinz-Hermann Koelle, Hans Kaiser, and others are a testament to the efforts that laid the foundation for humankind’s ascent into space.