It's 2010. Bix is 40, with four kids, restless, desperate for a new idea, when he stumbles into a conversation group, mostly Columbia professors, one of whom is experimenting with downloading or "externalizing" memory. It's 2010. Within a decade, Bix's new technology, "Own Your Unconscious"-that allows you access to every memory you've ever had, and to share every memory in exchange for access to the memories of others-has seduced multitudes. But...