From the Mixed-Up Files of Mrs. Basil E. Frankweiler

Claudia is the middle child of a busy family. She is smart and responsible, often required to help her mother around the house. However, weary of the life in suburban Connecticut, she decides to find something grander. Her younger brother Jamie, along with his extensive savings from playing cards, is enlisted as her partner in crime. They run away from home to the Metropolitan Museum of Art in New York City.