Imprisoned himself for two years in an Iranian prison after being arrested while hiking on the Iran-Iraq border in 2009, [Journalist Shane] Bauer returned to the United States in 2011 and began examining the inhumane practice of long-term solitary confinement. When he realized that America's growing private-prison industry (which houses 8 percent of all inmates) was even more impenetrable to reporters than public institutions, Bauer decided to embark on an undercover reporting experiment to better understand the ethically confounding state of corporate incarceration. Using his own name, he applied and was hired as an entry-level, $9-hour guard at Winn Correctional Center in rural Wingfield, La. Am I really going back to prison?" he writes in the introduction to his eye-opening and troubling new book, "American Prison: A Reporter's Undercover Journey Into the Business of Punishment." Bauer's book is a searing indictment of the corruption and cruelty rampant in a system with post-slavery origins that is based not on rehabilitation but profitability. "It's important to not take the kind of prison system we have today as a given. It was something that was invented here in this country, has floundered many times, and part of what has kept it alive throughout American history is that companies and states were making money on their prisoners, not because it was necessarily keeping society safe or rehabilitating people," [said Bauer].