Louisiana State Penitentiary, better known as Angola, is in many ways a world apart: a former slave plantation bigger in area than Manhattan, nestled in a crook of the Mississippi, where prisoners still work the fields overseen by guards on horseback. Many live out their days there and are buried on the grounds. It's a world Marianne Fisher-Giorlando counts herself lucky to be a part of. She's a criminologist who's spent a good share of her life studying and volunteering in Angola. She's become an authority on its workings, culture and history, and despite the fear and loathing the place may conjure, her experiences there have been surprisingly upbeat.