num_pages: 112
description: During Karen's month-long stay with her little-house family in Chicago, she teams up with a new friend to nab an art thief. Original.
language: English
title: Karen's Big City Mystery
titlecomplete: Karen's Big City Mystery (Baby-Sitters Little Sister, #99)
genres: Childrens, Mystery
ratings_count: 127
series: Baby-Sitters Little Sister
publisher: Scholastic Paperbacks