Chicago

This is the setting for the story.

Hyde Park

This is the neighborhood in which the story takes place.

University School

This is the school Petra and Calder attend. It is also where the painting is hidden.

University of Chicago

This is located near the University School and is connected to this school.

Powell's Used Books

This is where Calder works and where Calder and Petra bump into each other as Petra spies on Ms. Hussey.

Harper Avenue

This is where both Petra and Calder live.

New York

This is where Calder's friend Tommy has moved with his family. It is also the home base of the thief, Tommy's stepfather.

Gracie Hall

This is where the children first look for the painting but do not find it.

Delia Dell Hall

This is where the children find the stolen painting.

Castaglione's Treehouse

This is where the thief hides...