Terror That Comes in the Night: An Experience-Centered Study of Supernatural Assault Traditions
by: David J. Hufford 1990
A book on sleep paralysis from the University of Pennsylvania Press.
Wrestling with Ghosts: A Personal and Scientific Account of Sleep Paralysis
by: Jorge Conesa Sevilla Ph.D. 2004
Learn more about sleep paralysis.
I just purchased the book, "DMT - The Spirit Molecule" by Rick Strassman MD Ill make sure you get it after I'm done bro.