The first book I ever read about survival after death was Raymond Moody's Life After Life. This was a long time ago now. And Moody's book was a rare book, at that time. These days, there are many books reporting near death experiences.
When my dad died, I had experiences I could not explain. A part of me was very left-brained and had firm conviction that there were no such things as ghosts and that communication with the spiritual dimension was not something that really happened. Meanwhile, I was psychic and had all sorts of experiences that could not really be explained. Yup, that's what we call disassociation :-) I think most of us have something like that in our lives. I knew someone who would never find himself in a war, yet ended up in the reserves :-)
Anyway, I saw my dad's spirit, when I was not in the least bit expecting it and, as I said, did not believe anything like that could happen.
I didn't know what was going on. I didn't know how to find out. It was by a strange "coincidence" that I found Moody's book. And that explained everything I had experienced with my dad.
After that, other books came my way. Thinking back, it was the beginning of my official spiritual journey.
I have discovered that reading books about near death experiences is a great way to learn about the nature of reality. It is also great to read when your life is a mess. The books offer a birds-eye perspective on life and make your troubles look trivial.
As I said, since Moody wrote his book, the first of its kind, many, many books have appeared since.
Recently, I came across Natalie's Sudman's near death experience on YouTube.
Everyone's near death experience is different, but I found Sudman's experience particularly interesting because she describes her experience in terms of energy -- and that's how I work when I give psychic readings, I see energy in the aura.
There are many interviews with Sudman, including one with Buddha at the Gas Pump, but here's the one I came across. Also, she has a book about her experience.