Books: 

Eben, Alexander: Proof of Heaven
A Scientist’s case for the afterlife

Fox, Mark: Spiritual Encounters with Unusual Light
Phenomena: Lightforms
(University of Wales Press).

Geiger, John: Chapel of Extreme Experience
(Soft Skull Press).

Mavromatis, Andreas: Hypnagogia: The Unique State of
Consciousness Between Wakefulness and Sleep
(Routledge).

Ring, Kenneth: Mindsight: Near-Death and Out-of-Body
Experiences in the Blind
(Universe, 2008).

Ring, Kenneth: Lessons from the Light: What We Can
Learn from the Near-death Experience
(Moment point Press, 2006)

Peake, Anthony: Is There Life After Death?
(Chartwell Books).

Peake, Anthony: The infinite Mindfield

Peake, Anthony: The Out-Of-Body Experience:
The History and Science of Astral Travel
(Watkins Pub Ltd).

Strassmann, Rick: DMT: The Spirit Molecule:
A Doctor's Revolutionary Research into the Biology
of Near-Death and Mystical Experiences
(Park Street Press).

Van Lommel, Pim: Consciousness Beyond Life:
The Science of the Near-Death Experience
(HarperOne).

Ustinova, Yulia: Caves and the ancient greek mind
(Oxford University press 2009).

Carse, David: Perfect brilliant stillness
(Non Duality press 2006)

Moorjani, Anita: Dying to be me: My Journey from Cancer,
to Near Death, to True Healing
(Hay House 2012).