National Treasure: Book of Secrets (titled National Treasure 2: Book of Secrets on the DVD/Blu-ray Disc release) is a 2007 adventure film. It is a sequel to the 2004 film National Treasure and is part of the National Treasure franchise. It stars Nicolas Cage, Diane Kruger, Harvey Keitel, and Jon Voight.
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. It took just 38 days of release for the sequel to out-gross the original.
The film premiered in New York City on December 13, 2007 and was first released in Korea and Taiwan on December 19, 2007. It was then released in Australia and the Middle East on December 20, 2007. The film opened in the United States, Canada, Japan, Spain, and Italy on December 21, 2007. It was released in Germany and The Netherlands on January 24, 2008 and in the United Kingdom and Denmark on February 8, 2008.