Dan Brown, Robert Langdon Book 2: The Da Vinci Code. The Da Vinci Code. The Da Vinci Code, published in 2003, is the second book in the Robert Langdon series. Langdon finds the curator's body surrounded by baffling symbols, and with the help of police cryptologist Sophie Neveu, he uncovers a trail of clues hidden within the works of Leonardo da Vinci.
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