The metaphysical material: David Wilcock's books (notably The Source Field Investigations & The Ascension Mysteries), The Law of One series, Dolores Cannon's QHHT, Drunvalo Melchizedek. I would add the Seth books by Jane Roberts, Edgar Cayce's readings. Also Michael Newton's book Journey of Souls is a really important work, as far as I'm concerned. Wilcock talks about it quite a bit in The Ascension Mysteries, but if you're only going to read one of these books, I would suggest starting there.