There is a long tradition of people reporting extraordinary states — clarity, expansion, unity, silence. There is a much shorter tradition of having those states documented by clinical equipment that doesn't care what you believe.
In March 2015, the author's brain was mapped by a quantitative electroencephalogram in three states. The results were photographed, documented, and preserved. What the equipment recorded was not mysticism. It was voltage.
What that voltage means, what produced it, and whether it points toward something available to others — that is what this book investigates.