Mind the gap : a novel of the hidden cities
(Book)

All her life Jazz has known them only as the "Uncles," and her mother seemed to fear them as much as depend on them. Now these enigmatic, black-clad strangers are after Jazz for reasons she can't fathom, and her only escape is to slip into the forgotten tunnels of London's vast underground. Here she will meet a tribe of survivors calling themselves the United Kingdom and begin an adventure that links her to the ghosts of a city long past, a father she never knew, and a destiny she fears only slightly less than the relentless killers who'd commit any crime under heaven or earth to prevent her from fulfilling it.