Robert Langdon titled "Symbols of the Lost Sacred Feminine." It is later revealed in "The Lost Symbol" that "Symbols of the Lost Sacred Feminine" was published and created 'quite a scandal'. The book "Christianity and the Sacred Feminine", mentioned in "Origin" had reportedly been denounced by the Vatican, "which, in the aftermath, promptly became a bestseller," as quoted by the AI assistant Winston. Robert Langdon Professor Robert Langdon is a fictional character created by author Dan Brown for his "Robert Langdon" book series: "Angels & Demons" (2000), "The Da Vinci Code" (2003), "The Lost Symbol" (2009), "Inferno" (2013) and "Origin" (2017). He
Robert Langdon from him. While he is in the Louvre, he meets Sophie Neveu, a young cryptologist from the DCPJ. When Langdon and Sophie get the chance to talk in private, he finds out that Jacques Saunière is her grandfather. Saunière instructs Sophie to 'find Robert Langdon', according to the message he left for her in the floor. Hence, Sophie believes he is innocent of her grandfather's murder. He spends the rest of the novel dodging the police and trying to solve the mystery of an ancient secret society, the Priory of Sion, which was once headed by Leonardo da Vinci. At