I am looking for a novel written in the 70's or 60's that had a young man who invented a space plane that had a reflective or diamond coating and used a rare and special element to break the speed of light. With the help of aliens he stops a russian plot to build more space planes and take over the world. thanks for your help.
Space Eagle: Operation Doomsday
Space Eagle: Operation Star Voyage
both by Jack Pearl
In the first, scientific genius and adventurer Paul Girard invents the Swift, an antimatter powered spacecraft using the strange element "Spartanium". It has a hull composed of "fossilized plastic" which reflects hostile laser beams. He makes a secret pact with the President of the United States to be contacted in case of trouble. He is called when a plot is discovered, by the sinister master mind Dr. Lachisis, to create global thermonuclear war.
In the second Paul travels to Alpha Centauri, since the Swift can exceed the speed of light.