The Da Vinci Code is a bestselling conspiracy mystery book written by Dan Brown. It follows the story of Robert Langdon, a symbologist who gets caught up in a complex web of secrets and hidden messages. Langdon must decipher clues left by Leonardo da Vinci to unravel a conspiracy that could shake the foundations of Christianity. With its fast-paced plot and intriguing historical references, The Da Vinci Code has captivated readers worldwide.