Visitors from Time: The Secret of the UFOs
Marc Davenport

Nonfiction. A 30-year veteran of UFO research uses numerous examples of close encounters to establish the hypothesis that UFOs use a technology so advanced that they can literally warp the structure of space-time. The most thoroughly documented book available concerning UFOs and time travel. Contains easy-to-understand explanations of the Doppler effect and other scientific concepts. Extensive notes, bibliography, and index.