The Lost Symbol is a 2009 novel written by American writer Dan Brown. It is a thriller set in Washington, D.C., after the events of The Da Vinci Code, and relies on Freemasonry for both its recurring theme and its major characters.
Released on September 15, 2009, it is the third Brown novel to involve the character of Harvard University symbologist Robert Langdon, following 2000's Angels & Demons and 2003's The Da Vinci Code.
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See also:
[Lost Symbol [2/2]](https://openlibrary.org/works/OL27717939W)
Dan Brown is an American author of thriller fiction, best known for the 2003 bestselling novel, *The Da Vinci Code*. Brown's novels, which are treasure hunts set in a 24-hour time period, feature the recurring themes of cryptography, keys, symbols, codes, and conspiracy theories. His books have been translated into over 40 languages, and as of 2009, sold over 80 million copies.
Brown's novels that feature the lead character Robert Langdon also include historical themes and Christianity as recurring motifs, and as a result, have generated controversy. Brown states on his website that his books are not anti-Christian, though he is on a 'constant spiritual journey' himself, and says of his book *The Da Vinci Code* that it is simply "an entertaining story that promotes spiritual discussion and debate" and suggests that the book may be used "as a positive catalyst for introspection and exploration of our faith."
([Source][1])
[1]: http://en.wikipedia.org/wiki/Dan_Brown
