By Matt Stephens
Published: January 16, 2014.
Far beneath New York, exists a Secret City. It's a place of wonder, beauty and danger. No-one who enters uninvited leaves alive. It's an invisible community where all those that the world had cast off, ignored or forgotten can thrive and become something far grander. And Vincent McCall has found himself drawn into this mysterious place, racing against time to save it, and himself, from disaster.