Part I. The UFO Mystery
Chapter 1: The Challenge
Chapter 2: Report to Congress
Chapter 3: Recent Sightings in The Pacific
Chapter 4: The Swedish “Ghost Rockets”
Part II. A Scientist Looks At UFOs
Chapter 1: Scientist Finds Some Saucer Reports Still To Be Satisfactorily Explained
Chapter 2: Saucers and Science
Chapter 3: An Open Letter To Scientists
Chapter 4: The Phenomena Of Angel Hair
Chapter 5: UFO Fleets Over Washington D. C.
Chapter 6: A New Dimension in UFO Phenomena
Chapter 7: Scientific Aspects of UFO Research
Chapter 8: NICAP and The UFO Challenge
Chapter 9: An Evaluation Of Aime Michel’s Straight Line Mystery
Chapter 10: The New UFO Policy Of The U. S. Air Force
Part III A Philosopher Looks At UFOs
Chapter 1: On The Physical Realities Of UFOs
Chapter 2: The Semantics Of Flying Saucers
Chapter 3: Science and the Unexpected
Chapter 4: The Manipulators Of Fear
Chapter 5: UFOlogy—A Delineation
Chapter 6: The UFOs And Proof
Chapter 7: Pigeon-Holes of Science
Chapter 8: The Scientific Obligation
Chapter 9: Why the Air Force UFO Investigation Is Unscientific
Appendixes
Appendix A: Documents Cited In the Text
Appendix B: The Griffin Statement
Appendix C: Some Statements by Scientists and Pilots
Appendix D: Skyhook Balloons
Appendix E: Electro-Magnetic Report
Appendix F: NICAP Advisor and Subcommittee List