The Settlement (Paperback) (ISBN-13: 9780987354457)

In an apocalyptic world, Frank and his family live in an underground
shelter called the Settlement. They live a parallel, virtual existence,
far from the devastation and turmoil of those who live in the savagery
above. Outside the protected underground bunkers, mankind is divided
into two groups: the Hunters and the Hunted. As the occupants of the
Settlement already know, no one on Earth is safe.

"People still lived here in the city, but they mainly scurried around old sewers
and subways. But even underground they were not safe; Hunters knew they
were there and often went underground to cull them. Life was tenuous."