Solomon Key - the upcoming novel from Dan Brown - author of The Da Vinci Code, Angels and Demons and more.

Solomon Key Plot

Solomon Key Plot

There have been a number of educated guesses regarding the content of The Solomon Key. While Dan Brown has offered some hints in interviews, in large part most ideas to the likely content of the upcoming book come from a marketing strategy used by Brown and his publishers. On the original jacket cover of The Da Vinci Code were a number of ciphers and symbols, the meaning of which was made clear when a web quest was posted on Dan Brown's website that referenced these clues. This competition made clear that the ciphers referenced the content of the next book from Dan Brown:
"Disguised on the jacket of The Da Vinci Code, numerous encrypted messages hint at the subject matter of Dan Brown's next book"

From these clues, it seems that the following will play a part in the novel:
The fraternity known as Freemasonry
The Masonic membership of 20 of the 56 Founding Fathers
The semi-esoteric architecture of Washington, D.C.
Solomon Kullback, a famous NSA cryptographer
Robert Langdon as the protagonist
A look into the history of the United States (this has since been confirmed by Brown).

It is reported that the book will reference controversial subjects such as the deist viewpoints of some of the Founding Fathers and the Skull and Bones secret society.[4] KSL-TV in Salt Lake City ran a story that in 2004, Dan Brown visited Salt Lake and seemed very interested in the Masonic nature of the symbols carved on the outside of the LDS Temple.[5] This relationship, among others, between Freemasonry and Mormonism may play a role in The Solomon Key.

From Wikipedia.org