The Supernatural by Whitley Sreeber

The Supernatural is a great jumping off point to several of the books, but we might want to work reverse chronologically back through a bit. Whitley Sreeber's encounters with what he calls the visitors are very much a part of the natural world. They're often very physical in nature. He even suggests that the soul is somehow a plasma or it's electromagnetic in nature in some way. So he very much wants to argue that what he's experienced is certainly extraordinary, but it remains apart of the world that we actually live in. It's real. It's physical.