The book cover of Dan Brown’s much-anticipated novel "The Lost Symbol" — his first novel since "The Da Vinci Code" — has been revealed.

The cover shows a key surrounded by flames and bearing a Freemasonry symbol above Capitol Hill, suggesting the action will unfold in America's seat of power.

The new thriller— will be preceded by a summer-long procession of "codes, cryptic trivia, puzzles, secret history, maps, aphorisms" and other daily teasers on Facebook and Twitter .

The book, which comes out in the fall, will be set in Washington, DC, and will feature "Da Vinci Code" protagonist Robert Langdon, again caught up in secret societies and hidden codes.

"The Da Vinci Code," released in 2003, has more than 80 million copies in print worldwide.

"The Lost Symbol" has an announced first printing of 5 million.

The novel will be available to buy on 15+09+09.

So mote it be.

Above: YouTube video showing the unveiling of UK cover

Belfast Telegraph