Hey! I just finished Smells Like Dog and it was too cute!http://www.shelfari.com/books/13626138/Smells-Like-Dog
But that might be a little too kiddy, ha!
I'm not sure you can find books on Shelfari by category like that. If you go to the Books drop menu at the top of the page, you can go browse them by subject, so that might help. You can also jump over to Amazon as their search engine is a bit nicer.
There is Alan Bradley's mystery series where the young girl is the one solving crimes:
Flavia de Luce series:http://www.shelfari.com/series/Flavia-de-Luce
I'm enjoying Theodore Boone series by John Grisham.