New York is a city of highs and lows, where wealthy elites share the streets with desperate immigrants and destitute locals. Bridging this economic divide is New York's underground economy, the invisible network of illicit transactions between rich and poor that secretly weaves together the whole city.

Sudhir Venkatesh, acclaimed sociologist at Columbia University and author of Gang Leader for a Day, returns to the streets to connect the dots of New York's divergent economic worlds and crack the code of the city's underground economy. Based on Venkatesh's interviews with...