"From the Mixed-Up Files of Mrs. Basil E. Frankweiler" is a children's novel by E.L. Konigsburg that follows two siblings, Claudia and Jamie Kincaid, who run away from home. They decide to hide in the Metropolitan Museum of Art in New York City, where they explore the museum's treasures and enjoy their newfound freedom. While living in the museum, they become intrigued by a mysterious statue of an angel. Their adventure leads them to seek out the previous owner, Mrs. Basil E. Frankweiler, who holds the key to the statue's secrets. The story combines themes of adventure, art, and self-discovery.