Sum is a stunning exploration of funny and unexpected afterlives that have never been considered--each presented as a vignette that offers a lens through which to see ourselves 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, you work as a background character in other people's dreams. Or you may find that the afterlife contains only those people whom you remember. The stories in Sum are rooted in romance, science, and awe: a mixture of death, hope, computers, immortality, love, biology, and desire that cuts through human nature at new and exciting angles.

From a distant world the invaders came. They were a race not unlike mankind but technologically advanced enough to impose their genocidal interests on Earth. In their wake nearly all of the human population is disintegrated, blanketing the surface of the planet in white dust. This holocaust is the ultimate waste of life, as the aliens discover the new world they have conquered and colonized is incompatible with their biology. Now scattered survivors, both human and alien, trudge through this post-apocalyptic wasteland: a power-hungry science fiction writer, a brilliant scientist losing his battle with schizophrenia, a man convinced he's the robot he portrayed on television in pre-invasion times, a recalcitrant hero who has proclaimed himself the son of God, a former boxer tortured by his past and the tribe of misfits who follow him, and a young girl chosen to bear the children of a new civilization in the last known settlement of humanity. Some are aimless, others purposeful, but all cling to survival and their own sanity, unaware their fates are intertwined. When Earth's champions gather, is there hope for a better world? No, definitely not.