
These are the chapter numbers where the initial letters are arranged in Caesar box format, revealing the code "E Pluribus Unum".
A circle with numbers, between the Doubleday logo and the barcode, reveals a secret message. This too is a reference to part 2 of the Kryptos sculpture. It is a phrase printed invertedly, in the torn part of the book cover. The words "only WW knows" can be seen on the back cover. The message: Is there no help for the widow's son (a reference to Freemasonry). There is a secret message hidden in the text of the book flaps. Bold letters are present on the book jacket. When asked why the coordinates are one degree off, Brown's reply has been, "The discrepancy is intentional". The coordinates were taken from part of the decrypted text of part 2 of the sculpture (part 4 has never been solved). Adding one degree to the latitude gives the coordinates of the headquarters of the Central Intelligence Agency in Northern Virginia, which is the location of a mysterious sculpture called Kryptos. That the back of the book jacket conceals latitude and longitude coordinates, written in reverse, light red on dark red. Several thousand people actually solved the codes, and one name was randomly chosen to be the winner, with the name announced on live television, Good Morning America, in early 2004. Part of the advertising campaign for the novel was that the artwork in the American version of the bookjacket held various codes, and that the reader who solved them via the author's website would be given a prize.