Always assume there's someone after you. That was the paranoid wisdom her mother had hardwired into Jasmine Towne ever since she was a little girl. Now, suddenly on her own, Jazz is going to need every skill she has ever been taught to survive enemies both seen and unseen. For her mother had given Jazz one last invaluable piece of advice, written in her own blood. Jazz Hide Forever 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 the 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.
Mind the Gap in the first of the Hidden Cities series by Christopher Golden and Tim Lebbon. Let just say it is amazing. From the first page this story grips you. Jazz finds out from the very beginning with the death of her mother, that she cannot trust anyone. She takes to the Underground where she meets Harry and the United Kingdom, a group of lost kids. There is a feel of Oliver Twist to the United Kingdom.
The story continues to have twists and turns, with the introduction of new characters that must help Jazz embrace her destiny. There are heart breaking losses, but all are necessary for Jazz to reach her goal.
All in all this is a wonderful read and I can't wait to read the next in the series, The Map of Moments.