From an award-winning science journalist, a “deeply researched, entertaining, and impassioned exploration of sanitation” (Nature) and the future of the toilet—for fans of popular science bestsellers by Mary Roach.Most of us do not give much thought to the centerpiece of our bathrooms, but the toilet is an unexpected paradox. On the one hand, it is a modern miracle: a ubiquitous fixture in a vast sanitation system that has helped add decades to the human life span by reducing