Buena Vista Pictures has announced the name of the National Treasure sequal. "National Treasure: Book of Secrets" is scheduled to be released on December 21, 2007.
 
The subtitle refers to the 18 pages of a book from John Wilkes Booth's library, and the movie will possibly involve Abraham Lincoln.  
 
The movie is being directed by Jerry Weintraub and produced by Jerry Bruckheimer once again.  The Book of Secrets will star Nicholas Cage, Justin Bartha, Diane Kruger, Jon Voight an Harvey Keitel.