America is fascinated by prisons and prison culture, but few Americans understand what it is like to work in corrections. Claire Schmidt, whose extended family includes three generations of Wisconsin prison workers, introduces readers to penitentiary officers and staff as they share stories, debate the role of corrections in American racial politics and social justice, and talk about the important function of humor in their jobs.

In a state that locks up a disproportionate number of men and women of color, white prison workers occupy a complicated social position as representatives of...