Meet KC and Marshall—and help them solve four exciting mysteries in Washington, D.C.! #1 Who Cloned the President?: When KC notices the President acting different on TV, she thinks he’s been cloned! #2 Kidnapped at the Capital: At the Cherry Blossom Festival, KC’s mom and the president are kidnapped! #3 The Skeleton in the Smithsonian: Sneaky Mr. Fisher swears he is the heir to the famous Smithsonian museum. KC and Marshall think they can prove it’s not true. #4 A Spy in the White House: KC’s mom is getting married . . . to the president. But to save the wedding, KC and Marshall have to find a spy in the White House!