In the second half of the nineteenth century, American cities began to go dark. As hulking new buildings overspread blocks and pollution obscured the skies, glass and smog screened out the health-giving rays of the sun, and doctors began to note a resurgence of "diseases of darkness" like rickets and tuberculosis. The new problems were met by social reformers, doctors, scientists, and a growing nudist movement, each with their own remedies for America's new dark age. In "American Sunshine", Daniel Freund tracks the American obsession with sunlight from those dark days into the twentieth century. As architects, city planners, and politicians made access to sunlight central to public housing and public health, entrepreneurs, dairymen, and tourism boosters transformed the pursuit of sunlight and its effects into a commodity. Within this historical context, Freund sheds light on important questions about the commodification of health and nature, and makes an original contribution to the history of cities, consumerism, and medicine.