Capital mysteries

KC discovers that the President of the United States has been replaced by a clone and sets out with her friend Marshall, on a dangerous mission to set things right.

On a trip to Pennsylvania, presidential stepdaughter KC Corcoran and her friend Marshall are exploring the rest of the train when the special caboose at the back disappears--along with the Vice President.

KC and her friend Marshall accompany KC's stepfather, the United States President, to remote Camp David, where they find clues that point to either ghostly or criminal activity.

KC and Marshall run across a forgotten cubbyhole while painting a closet at the White House and find a box of toy horses that once belonged to Thomas Jefferson; when they go to Monticello to return the horses, the box disappears, and they explore the building and grounds to find the thief.

KC and Marshall investigate the theft of a precious emerald, brought by representatives of the Chinese government to bring luck to two baby tigers born at the National Zoo.

KC and Marshall throw a Halloween party at the White House, wake up the next day to discover fake, damaging photos of President Thornton on the Internet, and try to help save his election.

KC and Marshall investigate the theft of a priceless Tiger's Eye that was loaned to the National Zoo from China.

When Leonard Fisher claims to be the long-lost heir to the Smithsonian fortune, KC and Marshall set out to prove that he is a phony.

KC and Marshall see unauthorized fireworks at the FBI Building and decide to unmask the culprit and his plans for blackmail.

KC and Marshall set out to solve the mystery of the Lincoln Memorial statue's broken thumb.