"Mrs. Basil E. Frankweiler" is a children's novel written by E.L. Konigsburg. The story follows two siblings, Claudia and Jamie Kincaid, who run away from home to live in the Metropolitan Museum of Art in New York City. They seek adventure and a sense of independence while exploring the museum's vast collection. During their stay, they discover a mysterious statue of an angel and become intrigued by its origins. Their quest to uncover the statue's history leads them to Mrs. Basil E. Frankweiler, an eccentric woman who holds the key to the statue's secrets. The novel explores themes of identity, family, and the importance of art.