From the vision of a young railroad engineer reacting to the crushing pressures of a rapidly expanding metropolis, sprung Grand Central Terminal, which on its 100th birthday this year is still considered the finest urban transportation hub ever built. A newly published book, “Grand Central” by Sam Roberts, explores this massive project from start to finish, and some of the details are simply staggering. It was a two billion dollar construction job in today’s terms, created 300 railway cars of debris each day, and employed 10,000 workers on site around the clock. All in the center of Manhattan! Take a minute to read some excerpts from Roberts’ book, printed recently in this New York Times article.