In the fourth book of the Capital Mysteries—an early chapter book mystery series featuring fun facts and famous sites from Washington, D.C.—KC's mom is getting married...to the President of the United States! KC wants the day to be perfect, but someone keeps leaking wedding secrets. They newspapers have even printed where the president and his bride are going on their honeymoon. To save the wedding, KC and Marshall have to track down the spy in the White House!

Capital Mysteries is a series of mystery novels for young readers written by Ron Roy. It was inaugurated in 2001 with Who Cloned the President?, illustrated by Liza Woodruff and published by Golden Books. Beginning with the third volume in 2003 it was illustrated by Timothy Bush and published by Random House.