Here's something we do know. We're going to die. Maybe sooner than we had planned or hoped, maybe later. But that needn't stop us from wondering about what is real, or about how the world, how reality, is structured, or about what happens, or might happen, next. And those wonders, those attempts at understanding, actually inform and enrich the selves that we are and become. We may not come away with certain or irrefutable answers, but we will come away with a greater appreciation of life's richness and our participation in that richness. And that's the purpose of this book, to help the reader on that journey.