Barnabas Bopwright Saves the City

On his way to school, Barnabas discovers a transit map with an unknown subway line. Soon he's on an impossible train, running from authorities who have guarded the city's dark mysteries for a century. The subway brings Barnabas to a hidden valley outside the city where he's drawn into a terrifying world of deception and revenge.

In the valley, Barnabas discovers new friendships, a death-defying circus, an evil emporium, and a surprising attraction for another boy. But when his investigations uncover a terror plot to destroy the city he loves, Barnabas realizes it's up to him to save his home and bring deadly secrets into the light before it's too late.