Book excerpt: Where do we go from here? TIME brings you a visually inspiring exploration of humankind's speculation about the afterlife, from the Christian view of heaven to its myriad spiritual and literary versions: Valhalla, Nirvana, Shangri-La and many other concepts of paradise. The quest is not just a spiritual one, but a scientific and eyewitness journey as well. Fully 85% of Americans believe in heaven, according to Gallup, and now TIME takes you on an unforgettable quest into what it may look like. Our quest for understanding the afterlife include: What are the common elements (and key differences) in how cultures around the world view the afterlife? Ware Near-death Experiences and why do so many people report similar accounts? Do we have a psychological need to believe in life after death? How did the biblical version of heaven take shape? What are the best literary depictions of heaven, from "Pardiso" by Dante to "The Lovely Bones" by Alice Sebold.