OriginBy: Dan Brown Series: Robert Langdon Robert Langdon returns in Dan Brown's brilliant new thriller, THE SECRET OF SECRETS, available now. The global bestseller featuring symbologist Robert Langdon, from the author of THE DA VINCI CODE and 'master of the intellectual cliffhanger' (Wall Street Journal) Dan Brown. Robert Langdon, Harvard professor of symbology and religious iconology, arrives at the Guggenheim Museum Bilbao to attend the unveiling of an