These books cover a wide variety of topics that considered to be on the edge of what is considered acceptable. They cover subjects such as the hollow earth theory, cryptozoology (Big Foot and the Loch Ness Monster), and the role of aliens in ancient religions. The collection is made up of an eclectic mix of scholarly discussions about the origins of religions, physics, space & time travel; but also includes many purely fictitious works about "Sexy Saucer People" and world domination.
The collection is based around the works that were written by Barker. However, it also includes many of the other works produced by the Saucerian Press, as well as, many of the standard ufological books. The collection maintains a complete run of James Moseley's Saucer News, now known as Saucer Smear, which is still in syndication. This collection provides insight in Gray Barker's vision of UFO and aliens, as well as ufology in the mid to late 20th century.