Sum is a dazzling exploration of unexpected afterlives-each presented as a vignette that offers a stunning lens through which to see ourselves in the here and now. In one afterlife, you may find that God is the size of a microbe and is unaware of your existence. In another version, you work as a background character in other people's dreams. Or you may find that you are split into all your different ages, or forced to live with annoying versions of who you could have been. These wonderfully imagined tales are rooted in science and romance and awe: a mixture of hope, hilarity, immortality, love, biology, and desire that exposes radiant new facets of our humanity.