Does anyone know any good fantasy books that has awesome action with thieves or gutter rats?

Read a nice Nancy Drew book but not like those kidy ones (a kidy one like who stole the egg) but like Nancy Drew and a talent for stelling.

i have a book its called the thife lord its by cornelia funk... i dont no if you will like it but its got ur good bad stuff in it and stuff..??

It sounds like Neverwhere is the book for you :)
Neverwhere, by Neil Gaiman, is about an underground society in London. It's full of magic and danger, and those who fall through the cracks of society often end up in this world (such as runaways, the homeless, the outcasts, or those who were either born into it or brought by someone who was already there). There are thieves and gutter rats, as well as a lot of action XD It's an amazing book, one of my favorite books, actually ^_^