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 USA's forefathers, searching for the truth about the secret society of the Masons. Behind new doors lie secrets that promise to change the way people view science and politics, now threatened by Zachary Solomon, the renegade, estranged son of Robert Langdon's friend, Peter Solomon, who has himself been kidnapped by Zachary, now going by the name Mal'akh. Robert Langdon is the last line of defense. With help from Katherine Solomon (Peter's younger sister), Warren Bellamy (the Architect of the Capitol) and Inoue Sato (the director of the Office of Security). In "Inferno", Langdon wakes up in an Italian hospital with