Adventure, suspense, detection, and humor are involved when 12-year-old Claudia and her younger brother elude thesecurity guards and live for a week in New York's Metropolitan Museum of Art. 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 Jamieto go, too, mostly because he was a miser and would have money The two took up residence in the museum right on schedule. But once the fun of settling in was over, Claudia had two unexpected problems: She felt just the same, and she wanted to feel different; and she found a statue at the museum so beautiful she could not go home until she had discovered its maker, a question that baffled even the experts. The former owner of the statue was Mrs. Basil E. Frankweiler And without her help Claudiamight never have found a way to go home.