Explore the UFO mysteries J. Allen Hynek uncovered with Project Blue Book and how his findings challenged the Air Force's ...

UFOs, or the notion of them, have been around a long time. Here’s a look at how the various iterations of the subject — from ...

Get the latest news about Project Blue Book. Find exclusive interviews, video clips, photos and more on Entertainment Tonight.

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

There are a ton of books in this sale, so making recommendations is both very easy and very difficult at the same time. I'll reiterate once again that it's absolutely worth just going into the sale ...