Jacques Vallees Passport to Magonia

https://archive.org/details/PassportToMagonia--UFOsFolkloreAndParallelWorldsJacquesVallee1993

This is a free digital copy of Jacques Vallee's "Passport to Magonia", which can be read from your browser or downloaded in PDF form.

As far as ufologists go, this guy has some pretty solid acclaim and accreditation. It says he's a mathematician and scientist who has worked as a consultant for NASA.

The premise of the work seems to be that aliens, angels, and demons, are all just different spins on the same phenomenon: interdimensional entities. And that they appear to us humans as far more than just those forms, but as fairies, gnomes, leprechauns, wendigos, yetis, dragons, orbs of light, and so-on.

Frankly I'm becoming more partial to the idea that angels & demons are the truth and that everything else, including aliens, are just one big psy-op. So I'm not going to adopt his conclusions just because he holds some appeal of authority. That said, like EVERYTHING ELSE I research, I will keep what he says on the back-burner and corroborate it based on other information and experiences as they come.
(Though I've learned to be careful about that too, as I realize that people can be carefully guided into changing their entire worldview by "information traps" laid by external forces or parties).

But he could very well be right, after all. And I won't discount that for now. Everything must remain in a superposition of "possible" for as long as... possible.