Reddit reviews Reunions: Visionary Encounters with Departed Loved Ones

Sure. :) I was trying not to hijack the thread, but I'll just put the list here and that way anyone can have it. Keep in mind, these aren't all collections of stories, some of them are research topics, but none of them that I've browsed through look like bad reads. The ones I have read I've tried to note.

Iroquois Supernatural: Talking Animals and Medicine People - Michael Bastine, Mason Winfield - most closely related to thread topic

Life After Life - Raymond Moody - Very good intro to Near Death Experience research

Reunions: Visionary Encounters with Departed Loved Ones - Raymond Moody

Journey of Souls - Michael Newton - Read this one, it was great, changed my views on reincarnation

The Day Satan Called - Bill Scott

Hunt for the Skinwalker - Colm Kelleher, George Knapp - read parts of, need to finish

The Vengeful Djinn - Rosemary Ellen Guiley - I've read this one, it's really good too, has a large "slow" section in the middle that quotes the Q'uran a lot, but some good creepy Djinn stories.

The Djinn Connection - Rosemary Ellen Guiley

Ghost Culture: Theories, Context, and Scientific Practice - John Sabol

Zones of Strangeness - Peter A. McCue

Lost Secrets of Maya Technology - James O'Kon

The Mythology of Supernatural - Nathan Robert Brown - this one might sound cheesy, but I've read a book on world mythology by the same author, and apparently the writers of the show did their research

Holy Ghosts: Or How a (Not-So) Good Catholic Boy Became a Believer in Things That Go Bump in the Night - Gary Jansen

Psychologist Giovanni Caputo named this the strange-face-in-the-mirror illusion. Here's an article in the journal Perception from 2010. What he didn't know, was that the effect already had a name: The Ganzfeld effect. Heck, it has tons of names. It's also called Prisoner's Cinema. Psychomanteum.

I'll talk about the Ganzfeld effect first. You've probably heard about it. "White noise + sliced ping pong ball over eyes = hallucinations". It was popular some years back. It dates back to some studies in the 1920's by German psychologist Wolfgang Metzger, who believed you somehow became psychic in the Ganzfeld (Total Field). He was of course proven wrong. Here's an example of him being proven wrong, if you want to be assured for some reason. The effect is real, though. You hallucinate when you're deprived of your senses.

Prisoner's Cinema was a name given to a phenomenon supposedly experienced by prisoners in poorly lit cells: they hallucinated. It's not very well documented (i.e possibly just a dumb anecdote).

Psychomanteum? Well, according to Dr. Raymond Moody, that was something the Greek did to get in touch with the dead. They induced hallucinations in people. Dr. Moody abused this illusion (willfully or not) to convince people they were connected to dead relatives and friends. To his defense, he claimed to be doing so to bring the patients therapeutic closure. Here's his version.
Here's a study by some other folks. The Greek themselves called this catoptromancy.

You wanted a name? I'll give you another name: Charles Bonnet's Syndrome.

Okay. So when you can't see very much, you sometimes see things which aren't there. It doesn't have a good name as of yet, but it's a real thing. Sleep paralysis used to be this crazy thing before it got studied and the superstition got nailed to the coffin. This needs to happen here as well. Otherwise, people will take advantage of the confusion and abuse people who don't know any better.