Twilight RobberyFrances Hardinge2011

As dusk approaches, the good people of Toll-by-Day slam shut their doors and tremble. For as the shadows lengthen, the city of Toll-by-Night emerges from the darkness - a city full of scoundrels, brigands and murderers. Stuck in this wicked underworld, orphan Mosca Mye and her conman companion Eponymous Clent find themselves embroiled in a dark and treacherous kidnap plot, with only a midwife, a waywad goose and a war-crazed knight to help them...