Sudhir VenkateshSudhir 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 Directorof 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. Read More Read Less