Fly Trap by Frances Hardinge (Children's)
I absolutely loved the first book, Fly By Night. It had an incredibly original plot and a main character who was considered unlovable by those around her, but who the reader knew was a wonderful person. Mosca Mye's name has dark connotations since she was born during the hours of the fly god, so everyone sees her as a skulking thief. It's even worse now that she and Eponymous Clent have fled the rebellion they may have caused and they find themselves in Toll. By day, only those born at the hours of the bright and beloved Blessed can walk the streets. If you are unfortunate enough to have a name like Mosca, you have to live in Toll-By-Night and never see the sun again.
Of course Mosca has a problem with this, and she is going to turn Toll on its head, try to steal its Luck and do whatever she has to to survive. Also known by the title Twilight Robbery, this book is both funny and intriguing.
The Mysterious Benedict Society by Trenton Lee Stewart (Children's)