John Langdon (typographer) Langdon is known mostly through his association with Dan Brown, and the novels "Angels & Demons", "The Da Vinci Code," "The Lost Symbol, Inferno, and Origin". The protagonist of these novels was named Robert Langdon as a tribute to John Langdon, and he will continue to be so for his next 12 books, an estimate given by Dan Brown himself. Langdon is now a professor of typography and corporate identity at Drexel University in Philadelphia. He continues to do work on ambigrams, as well and fine art works that incorporate language, type, and philosophy. Langdon credits his paternal grandparents for
Robert Langdon of 2003's "The Da Vinci Code", Robert Langdon is in Paris to give a lecture on his work. Having made an appointment to meet with Jacques Saunière, the curator of the Louvre, he is startled to find the French police at his hotel room door. They inform him that Saunière has been murdered and they would like his immediate assistance at the Louvre to help them solve the crime. Unknown to Langdon, he is in fact the prime suspect in the murder and has been summoned to the scene of the crime so that the police may extract a confession