Sum is a dazzling exploration of funny and unexpected afterlives. In the afterlife you may find that God is the size of a microbe and unaware of your existence. Or you may find the afterlife contains only those people whom you remember. You may be split inot ally your different ages, or be forced to live with annoying versions of yourself that represent what you could have been. In these wonderfully imagined tales, neuroscientist and writer David Eagleman offers us a series of lenses through which to see ourselves here and now. His stories are rooted in science and romance and awe at our mysterious existence: a mixture of death, hope, computers, immortality, love, biology, and desire that exposes radiant new facets of our humanity.