In this intriguing book, Hendrik Hartog uses a forgotten 1840 case to explore the regime of gradual emancipation that took place in New Jersey over the first half of the nineteenth century. In Minna's case, white people fought over who would pay for the costs of caring for a dependent, apparently enslaved, woman. Hartog marks how the peculiar language mobilized by the debate--about care as a "mere voluntary courtesy"--became routine in a wide range...