National Treasure: Book of Secrets (released on home video as National Treasure 2: Book of Secrets) is a 2007 mystery adventure film directed by Jon Turteltaub and produced by Jerry Bruckheimer. It is a sequel to the 2004 film National Treasure and is the second part of the National Treasure film series. The film stars Nicolas Cage, Diane Kruger, Justin Bartha, Jon Voight, Harvey Keitel, Ed Harris, Bruce Greenwood, and Helen Mirren.
It was stated in the first film's commentary that there were no plans for a sequel, but due to the first film's impressive box-office performance (earning $347.5 million worldwide), a sequel was given the go-ahead in 2005.
The film premiered in New York City on December 13, 2007, and was released in North America by Walt Disney Studios Motion Pictures on December 21, 2007. Like its predecessor, the film received mixed reviews but was a box office success, grossing over $457.4 million worldwide.