In 1991, a document was locked in the safe of the director of the CIA. The document is still there today. Its cryptic text includes references to an ancient portal and an unknown location underground. The document also contains the phrase 'It's buried out there somewhere. ' All organizations in this novel exist, including the Freemasons, the Invisible College, the Office of Security, the SMSC, and the Institute of Noetic Sciences. All rituals, science, artwork, and monuments in this novel are real.

Dan Brown’s new novel, the eagerly awaited follow-up to his #1 international phenomenon, The Da Vinci Code , which was the bestselling hardcover adult novel of all time, will be published on September 15, 2009. The Lost Symbol will once again feature Dan Brown’s unforgettable protagonist, Robert Langdon. “ The Lost Symbol is a brilliant and compelling thriller. Dan Brown’s prodigious talent for storytelling, infused with history, codes and intrigue, is on full display in this new book. This is one of the most anticipated publications in recent history, and it was well worth the wait,” said Sonny Mehta, Chairman and Editor in Chief of the Knopf Doubleday Publishing Group. Brown’s longtime editor, Jason Kaufman, Vice President and Executive Editor at Doubleday said, “Nothing ever is as it first appears in a Dan Brown novel. This book’s narrative takes place in a twelve-hour period, and from the first page, Dan’s readers will feel the thrill of discovery as they follow Robert Langdon through a masterful and unexpected new landscape. The Lost Symbol is full of surprises.” "This novel has been a strange and wonderful journey," said Brown. "Weaving five years of research into the story's twelve-hour timeframe was an exhilarating challenge. Robert Langdon’s life clearly moves a lot faster than mine."