Occult Ether Physics: Tesla's Hidden Space Propulsion System and the Conspiracy to Conceal it Book by William Lyne
This 2010 3rd Revised Edition of Occult Ether Physics has a new subtitle---Tesla's "Ideal Flying Machine" and the Conspiracy to Conceal It----because that's what Tesla called it. It is profusely illustrated with extensive documentation dating from the late 19th century up to the present. There are significant breakthroughs from the 2nd Edition in discovering more about what Tesla's technology was, and what happened to the technology when it went completely missing for almost the past century. You'll be surprised at the answers to your many questions, such as, how did the technology work based on Tesla's statements. Other questions are, Did the Nazis acquire it and how and when?