Scientific advances and economic forces have converged to create something unthinkable for much of human history: a robust market in human body products. Every year, countless Americans supply blood, sperm, and breast milk to "banks" that store these products for later use by strangers in routine medical procedures. These exchanges entail complicated questions. Which body products are donated and which sold? Who gives and who receives? And, in the end, who profits? In this eye-opening study, Kara Swanson traces the history of body banks from the nineteenth-century experiments that...