BERGAUST, Erik. Reaching for the Stars. Garden City: Doubleday & Company, Inc., 1960. -- BURCHARD, John (ed.) Rockets, Guns, and Targets. Boston: Little, Brown, & Company, 1948. -- CRAWFORD, Russell Tracy. Determination of Orbits of Comets and Asteroids. New York: McGraw-Hill Book Company, Inc., 1930. -- FIRSTOFF, V.A. Our Neighbour Worlds. London: Hutchinson's Scientific and Technical Publications, 1954. -- HARPER, Harry. Dawn of the Space Age. London: Sampson Low, Marston, & Co., Ltd., [n.d.]. -- HORT, Wilhelm. Die Differntialgeichungen des Ingenieurs. Berlin: Julius Springer, 1925. -- KOELLE, Heinz Hermann. Handbook of Aeronautical Engineering. New York: McGraw-Hill Book Company, Inc., 1961. -- LEY, Willy. The Lungfish and the Unicorn: An Excursion into Romantic Zoology. New York: Modern Age Books, 1941. INSCRIBED BY LEY WITH ACCOMPANYING DRAWING TO HERBERT SCHAEFER, "With my very best wishes." -- LEY, Willy. Bombs and Bombing: What Every Civilian Should Know. New York: Modern Age Books, 1941. INSCRIBED BY LEY TO HERBERT SCHAEFER, "Who began by suggesting that I should write this book and who ended up with patient proof-reading." -- MOULTON, Forest Ray. An Introduction to Astronomy. New York: The Macmillan Company, 1922. -- NILES, Edward R.C. Supersonic Aerodynamics: A Theoretical Introduction. New York: McGraw-Hill Book Company, Inc., 1950. -- OLIVIER, Charles P. Meteors. Baltimore: Williams & Wilkins Company, 1925. -- RANDOLPH, James R. (ed.). Journal of the American Rocketry Society. New York: American Rocket Society, Inc., [1948-1950]. -- SUTTON, George P. Rocket Propulsion Elements. New York: John Wiley & Sons, Inc., 1949. -- VINCENT, E.T. The Theory and Design of Gas Turbines and Jet Engines. New York: McGraw-Hill Book Company, Inc., 1950.

Provenance: Willy Ley (1906-1969), German-American science writer; Herbert Schaefer, German-American aerospace engineer and NASA employee.

And 204 others. Together, 219 works in 219 volumes, most in original bindings and most 8vo size, condition generally fine.