called the "National Treasure Presidential Edition", contains National Treasure and National Treasure 2: Book of Secrets inside a letter book which is a replica of the Presidents' secret book from National Treasure 2: Book of Secrets. Novelizations Disney Press published an official novelization of the screenplay titled National Treasure 2: Book of Secrets The Junior Novel on November 6, 2007. Parts of the story in the novel version differ slightly from what was actually filmed, owing to changes being made in the screenplay prior to and during production. For example, in the novel, Ben and Abigail photograph the wooden plank found hidden in the Queen's desk and leave it behind, with the car chase following. However, in the movie, they take the plank with them on the chase. Also published on the same day as the official novelization was a companion youth novel Changing Tides: A Gates Family Mystery by Catherine Hapka. Its story is set in England in the year 1612 and is the first in a series of planned historical novels about the Gates family. The epilogue from Changing Tides is included at the back of the National Treasure book. The second youth novel by Hapka, Midnight Ride: A Gates Family Mystery, was published on March 8, 2008. Accuracy The group mentioned in the film as being behind the assassination of Abraham Lincoln and pursuing the city of gold, The Knights of the Golden Circle, had actually disbanded in 1863. It was based in Cincinnati, Ohio, where its founder George W. L. Bickley resided. Though a native of Virginia, Bickley had actually been known for being an adventurer and also bad with finances. His main focus was also not on preserving the Confederate States of America (CSA), but restoring slavery in southern neighboring countries which he wanted to make part of a proposed nation dubbed "Golden Circle." While some members of the group would join the Confederate Army, Bickley was more focused on colonizing parts of northern Mexico as slave states. He would not join the Confederate Army until after his expeditions in Mexico faltered in 1863. Soon afterwards, the organization was exposed and many members were arrested while attempting to steal numerous gold shipments from San Francisco Bay. Following the outbreak of the American Civil War numerous Golden Circle members were not focused on fighting Union states north of the Mason-Dixon Line as the film suggests, but