The Thief Lord by Cornelia Funke
I recently finished listening to The Thief Lord by Cornelia Funke. You might know this author from the book Inkheart. This book is about a group of orphans and runaways living in an old movie theater in Venice, Italy. The rag-tag group is led by a mysterious boy who calls himself The Thief Lord. Just as his title suggests, he steals things to support his gang.
Everything is going well for this group of kids until, Propero and Bo's (two brothers) aunt comes looking for them. She wants to raise six-year-old Bo as her son and send twelve-year-old Propero to a boarding school. The two brothers must call upon The Thief Lord and all his cunning skill to save them. However, there is a snag, The Thief Lord is harboring a huge secret. One that might lead to the groups' destruction.
This book is a fun mystery to read or listen to. I would recommend it for upper elementary to middle school aged kids. Older teens would probably find it a little juvenile.