Who benefits from mass incarceration in the U.S.? In her new book Inside Private Prisons: An American Dilemma in the Age of Mass Incarceration (Columbia University Press, 2017), Lauren-Brooke Eisen explain how, when and why the for-profit prison system emerged, the ways in which it functions throughout the criminal justice system today, and what we might do to improve it.Stephen Pimpare is Senior Lecturer in the Politics and Society Program and Faculty Fellow at the Carsey School of Public Policy at the University of New Hampshire. He is the author of The New Victorians (New Press, 2004), A People’s History of Poverty in America (New Press, 2008), winner of the Michael Harrington Award, and Ghettos, Tramps and Welfare Queens: Down and Out on the Silver Screen (Oxford University Press, 2017).