On the edge, where science and spirituality meet.
I was surprised to understand as much as I did - all credit to SH's chatty accessible manner and his ability to make these insanely abstract concepts a little bit understandable to us plebs. Even with only the vaguest glimmer of comprehension, I find it exciting to imagine how these big questions will be pursued in the future. The book was published posthumously and is our last gift from this brilliant and humble genius.