A full count of the people living beneath the streets of Manhattan is difficult to achieve for two simple reasons: The population is transient and most census officials do not wish to go into the tunnels. Estimates of their numbers vary wildly, from a few hundred, to a few thousand, to tens of thousands. Since Grand Central Station was restored and most of its public seating removed, the homeless have largely disappeared from that very public venue, though they can still be found making efforts to keep themselves clean in the rest rooms on the lower levels. Though many of the "nests" above the tracks have been cleaned out, this does not mean the people who inhabited those nests are no longer in the city; rather, they have simply burrowed deeper into the tunnels, beyond the reach of official New York.
To date, there is no complete and integrated map of the tunnel system beneath the city. Partial maps exist: the subway system, the water system, the various utility systems. But in addition to the tunnels and passageways and storm drains that are still in use, there are miles of abandoned tunnels that have been long forgotten. Forgotten, at any rate, by everyone except those who live in them.
Contrary to popular belief, not all the people who live beneath the streets are derelicts and drunks. Many of them are productive members of society, holding jobs and attending school, giving false surface addresses to whatever bureaucracies they come in contact with. Some families have chosen to live under the streets rather than having their children separated from them by government agencies. Many of these people do not consider themselves homeless, but only "houseless." They organize themselves into tribes and family groups and establish territorial claims beneath the city. It is said that the deeper people live beneath the city, the less frequently they visit the surface and the less likely it is that they will ever live on the surface again.
Many of our subterranean citizens suffer from mental illness and chemical dependencies that often make them incapable of taking advantage of the services that are provided for them. They drift through our lives, muttering softly to themselves or ranting at invisible enemies, until finally they disappear back underground.
Underground and out of our consciousness.
All of the characters and events in this book, on the surface and in the tunnels, are fictional. At least, I hope they are…
– J.S.