Ash boards a Greyhound bus heading to the place where Bly was last seen: Snowflake, Arizona. Six thousand feet up in the wide red desert, Ash meets Mona, her dog, her goat, and her neighbors, and finds stepbrother Bly, too. In their ramshackle homes, the walls lined with tinfoil, almost all the residents of Snowflake are sick. But this isn't any ordinary sickness: the chemicals and technologies of modern life are poisoning them. They call...