well, well, well .. this is one interesting talk (conspiracies are always juicy subjects ) So, UFOs also made it to the list. Kudos. I have always found that topic interesting (who doesn't?) and spent countless hours reading up all sorts of stuff (who doesn't?) I'd recommend The Lure of the Edge as a sufficiently (if not the most) comprehensive and objective history of the debates surrounding the issue of UFOs. Every book needs to sell, so there might be some "interesting" stories or theories thrown in, just for good measure (who doesn't?) but by and large the book takes a neutral tone and simply tries to capture all the voices that have staked a claim in the clamor. Of-course, I have my own pet theory about them (who doesn't?) and I found some resonance for it in denzler's work, hence, too, the recommendation. Links: Buy: The Lure of the Edge | Scientific Passions, Religious Beliefs, and the Pursuit of UFOs | Brenda Denzler Peek: [Open access to Introduction and Table of Contents]