New York Underground - The Anatomy Of A City

I actually read this in November but forgot to write about it then, so this will be a little shorter than most. In any case, New York Underground is concerned with all of the underground tunnels that lay beneath New York City. There are a multitude of different types of tunnels, from aqueducts to subways to passenger walkways. All of which are explored in an interesting fashion, complete with lots of pictures and the odd interesting fact (I recall one being that when a subway station beneath what became the World Trade Center was being built in the early 20th Century, they found part of a boat sunk below the surface). If, like me, you find a sweet kind of mystery in subterreanean holes, then this is a very interesting, and very nicely put together, book and should be on your list.