"It was 1798 when the Morningstarr twins arrived in New York with a vision for a magnificent city: towering skyscrapers, dazzling machines, and winding train lines, all running on technology no one had ever seen before. Fifty-seven years later, the enigmatic architects disappeared, leaving behind for the people of New York the Old York Cipher -- a puzzle laid into the shining city they constructed, at the end of which was promised a treasure beyond...

Adventure, suspense, detection, and humor are involved when 12-year-old Claudia and her younger brother elude the security 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 Jamie to go, too, mostly...