W.A. Harbinson wrote a book in 1995, entitled “Projekt UFO: The case for Man-made Flying Saucers”. I remember, it had some well thought arguments, that basically, there is a ruthless technology right here on earth, and the scenario is definately something that people should be aware of, if not necessarily agree on.
For the record, there is some parts of this book, that i do not agree with, but it does get your mind thinking, questioning and so on, and this can only be a good thing.
His website can be found here
The second volume to this, “Pheonix: Projekt Saucer Book 2″ is available for free…. at the download page on his site.
I have not read it yet, but will be reading it soon..