I never really thought about why or how mass transit came into being. It is hard to believe that cities were that congested in the late nineteenth century. Little did I know, the Race Underground awakened a rich part of both Boston and New York’s history that lead to the building of the underground subways. It was fascinating to learn about the thought process of how they determined what would be the best way to build the subway. I also found it interesting that both Boston and New York did not want to privatize their mass transit systems. It is hard to believe that tunnels built over a hundred years ago still function today. It is a testament to the workmanship that I don’t believe we see any more. Doug Most did an extraordinary job of researching and detailing out in a thoroughly readable book.