Underrunners

When he wants to forget about his life, Tris visits the underrunners, the vast network of underground tunnels near his home. It's a fantasy world he tells no one about--until he meets Winola, whose escape from the Children's Home makes her Tris's perfect partner. Then they discover someone is watching them--suddenly their imaginary adventure turns horrifyingly real. An ALA Notable Children's Book and Booklist Editor's Choice.