Reddit reviews The Vengeful Djinn: Unveiling the Hidden Agenda of Genies

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

I wouldn't be able to do the topic much justice through a reddit post, but I'll reccomend you some great books on the topic

The encyclopedia of Demons and Demonology

The Dictionary of Demons: Names of the damned

The Vengeful Djinn: Unveiling the Hidden Agenda of Genies

The book of Yokai: Mysterious creatures of Japanese folklore

That oughta be a good start, because believe me the topic is as interesting as it is detailed.