Behold the Pale Horse: What We Really Know About Flying Saucers

From the introduction by John A. Keel: "At long last, a highly qualified science writer, NASA's Otto Binder, has reviewed the overwhelming mass of UFO material and organized it into a meaningful and lucid book. He has done a remarkable job of sifting fact from fantasy, and truth from nonsense. If there is a 'secret' to UFO mystery, it can be found somewhere in these pages."