A New York Times Bestseller "A rich portrait of the urban poor, drawn not from statistics but from vivid tales of their lives and his, and how they intertwined." — The Economist "A sensitive, sympathetic, unpatronizing portrayal of lives that are ususally ignored or lumped into ill-defined stereotype." — Finanical Times Foreword by Stephen J. Dubner, coauthor of Freakonomics When first-year graduate student Sudhir Venkatesh walked into an abandoned building in one of Chicago’s most notorious housing projects, he hoped to find a few people willing to take a multiple-choice survey on urban poverty—and impress his professors with his boldness. He never imagined that as a result of this assignment he would befriend a gang leader named JT and spend the better part of a decade embedded inside the projects under JT’s protection. From a privileged position of unprecedented access, Venkatesh observed JT and the rest of his gang as they operated their crack-selling business, made peace with their neighbors, evaded the law, and rose up or fell within the ranks of the gang’s complex hierarchical structure. Examining the morally ambiguous, highly intricate, and often corrupt struggle to survive in an urban war zone, Gang Leader for a Day also tells the story of the complicated friendship that develops between Venkatesh and JT—two young and ambitious men a universe apart. Sudhir Venkatesh’s latest book Floating City: A Rogue Sociologist Lost and Found in New York’s Underground Economy— a memoir of sociological investigation revealing the true face of America’s most diverse city—is also published by Penguin Press. "Riveting."  — The New York Times "Compelling . . . dramatic . . . Venkatesh gives readers a window into a way of life that few Americans understand." — Newsweek "An eye-opening account into an underserved city within the city."  — Chicago Tribune "The achievement of Gang Leader for a Day is to give the dry statistics a raw, beating heart." — The Boston Globe "A rich portrait of the urban poor, drawn not from statistics but from vivid tales of their lives and his, and how they intertwined." — The Economist "A sensitive, sympathetic, unpatronizing portrayal of lives that are ususally ignored or lumped into ill-defined stereotype." — Finanical Times Sudhir Venkatesh is the author of Floating City and Gang Leader for a Day , a New York Times bestseller that received a best book of the year award from The Economist. He has been a Columbia University Professor, a Director of Safety teams at Facebook and Twitter, and a Senior Advisor to the Department of Justice. Venkatesh’s writings have appeared in the New York Times , the Chicago Tribune , and The Washington Post . He lives in New York City. FOREWORD by  Stephen J. Dubner I believe that Sudhir Venkatesh was born with two abnormalities: an overdeveloped curiosity and an underdeveloped sense of fear. How else to explain him? Like thousands upon thousands of people, he entered graduate school one fall and was dispatched by his professors to do some research. This research happened to take him to the Robert Taylor Homes in Chicago, one of the worst ghettos in America. But blessed with that outlandish curiosity and unfettered by the sort of commonsensical fear that most of us would experience upon being held hostage by an armed crack gang, as Venkatesh was early on in his research, he kept coming back for more. I met Venkatesh a few years ago when I interviewed him for Freakonomics, a book I wrote with the economist Steve Levitt. Venkatesh and Levitt had collaborated on several academic papers about the economics of crack cocaine. Those papers were interesting, to be sure, but Venkatesh himself presented a whole new level of fascination. He is soft-spoken and laconic; he doesn’t volunteer much information. But every time you ask him a question, it is like tugging a thread on an old tapestry: the whole thing unspools and falls at your feet. Story after story, marked by lapidary detail and hard-won insight: the rogue cop who terrorized the neighborhood, the jerry-built network through which poor families hustled to survive, the time Venkatesh himself became gang leader for a day. Although we wrote about Venkatesh in Freakonomics (it was many readers’ favorite part), there wasn’t room for any of these stories. Thankfully, he has now written an extraordinary book that details all his adventures and misadventures. The stories he tells are far stranger than fiction, and they are also more forceful, heartbreaking, and hilarious. Along the way he paints a unique portrait of the kind of neighborhood that is badly misrepresented when it is represented at all. Journalists like me might hang out in such neighborhoods for a week or a month or even a year. Most social scientists and do-gooders tend to do their work at arm’s length. But Venkatesh practically lived in this neighborhood for the better part of a decade. He brought th