From the Mixed-Up Files of Basil E. Frankweiler

by E. L. Konigsburg

When Claudia decided to run away she planned very carefully. She would be gone just long enough to teach her parents a lesson in Claudia appreciation. And she would live in comfort – at the Metropolitan Museum of Art. She invited her brother Jamie to go too mostly because he was a miser and would have money. Once the fun of settling in was over, Claudia had two unexpected problems.
Ages 8 – 12