This author strikes me as having the mind-set of a True Scientist. Leaves it up to the reader to choose to believe in this subject, or reject it. The book contains many, many old sightings which I had never heard of, so is highly nformative.
Heartily recommended to all who wish to gain an unprejudiced look at this fascinating subject. One major disagreement: the author makes the assumption that any advanced alien culture would have just as much rapid change as we have. I believe this would indicate the beings to be from Earth. If an alien technology were 1,000 years ahead of us, would they have our half-yearly change in auto design, or would their autos (and space ships) have reached fruition, and be more static? MUST MUST read this book!
