All I can say is, "wow!" This is NOT a novel, but actual research into a subject that's almost always considered science fiction, that being anti-gravity.
The author, an editor of Jane's Defense, the most respected encyclopedia of weaponry on earth, doesn't take any flights of fancy, but focuses on research from different areas and tries to put that puzzle together to show us that real work is being done on this subject by the government, and that, possibly, they've actually had some break-throughs that they're not sharing with the public that gets to pay for their work. Even a non-science person would find this book fascinating in the extreme, and a science geek would be in nirvana.
Will pique your imagination
The Hunt for Zero Point explores the scientific speculation that "Zero Point" energy, a limitless source of potential power that may hold the key to defying and thereby controlling gravity, exists in the universe and can be replicated.
The ideal shape for a gravity-defying vehicle happens to be a perfect disk, making antigravity tests a possible explanation for numerous UFO sightings during the past fifty years. Ths is a very interesting book.