Transcending physical reality?
The field is really wide open, Dave. What gets your interest really? The mysticism of the Far East or the magicks of the West (a gross generalization, I know). Are you looking for religion or kooky-weird spiritual stuff?
I'd suggest keeping your eyes open, and your wits about you, as this field is full of incredible and uncredible people.
Of course, being closer to Buddhism, I'd suggest the books by the Dalai Lama
