# Robert Langdon (book series)

The Robert Langdon book series is named after Robert Langdon, the protagonist of the novels by American author Dan Brown. Langdon is portrayed as a Harvard University professor of religious iconology and symbology, a fictional field related to the study of historic symbols, which is not methodologically connected to the actual discipline of semiotics. Brown's novels that feature the lead character also include historical themes and Christianity as motifs, and as a result have generated controversy. Brown states on his website that his books are not anti-Christian, and that he is on a "constant spiritual journey" himself.

## Books of the series

| No. | Title | Publication date | ISBN |
| 1 | Angels & Demons | May 1, 2000 | 9780593055045 |
| When physicist Leonardo Vetra is murdered and branded with the word Illuminati, his boss, CERN director Maximilian Kohler, asks Harvard symbologist Robert Langdon for help. Meeting Vetra's daughter, Vittoria, Langdon learns that the Illuminati, an ancient anti-religious sect, plan to destroy Vatican City with an antimatter canister invented by Vetra refashioned as a weapon. Arriving during the election of the new Pope, the two follow a secret trail to find the group's lair and stop them. ||||
| 2 | The Da Vinci Code | March 18, 2003 | 9780307474278 |
| When the curator of the Louvre, Jacques Saunière, is murdered, circumstantial evidence leaves Robert Langdon as the prime suspect. Joined by Saunière's granddaughter, Sophie Neveu, he seeks to prove his innocence by following a trail left by the secret organization Saunière was part of and discovers a shocking secret dating back to the time of Christ. ||||
| 3 | The Lost Symbol | September 15, 2009 | 9780385504225 |
| Robert Langdon arrives in Washington DC at the behest of his mentor, Freemason Peter Solomon, only to find that he's been kidnapped. Joined by his old flame and Solomon's sister, Katherine, Langdon follows a trail of clues that leads him deep into the secrets of the Masons, whose members include Solomon's tattooed kidnapper. ||||
| 4 | Inferno | May 14, 2013 | 9780385537858 |
| Robert Langdon wakes up in a hospital in Florence, Italy with a head wound and no memory of the last few days. When an assassin shows up in the hospital and attempts to kill Langdon, Dr. Sienna Brooks helps him escape and discover what had happened during those missing days by following clues involving Dante's Inferno. ||||
| 5 | Origin | October 3, 2017 | 9780593078754 |
| Robert Langdon is invited to the Guggenheim museum in Spain to attend an event held by famous futurist and former student Edmond Kirsch, who has made a discovery he claims will change the way people view religion forever. When Kirsch is murdered before his announcement, Langdon attempts to uncover and release his secret before it's lost forever, leading him into conflict with those who would prevent the release, including members of Spain's Royal family. ||||
| 6 | The Secret of Secrets | September 9, 2025 | 9780385546898 |
| Robert Langdon, esteemed professor of symbology, travels to Prague to attend a groundbreaking lecture by Katherine Solomon—a prominent noetic scientist with whom he has recently begun a relationship. Katherine is on the verge of publishing an explosive book that contains startling discoveries about the nature of human consciousness and threatens to disrupt centuries of established belief. But a brutal murder catapults the trip into chaos, and Katherine suddenly disappears along with her manuscript. Langdon finds himself targeted by a powerful organization and hunted by a chilling assailant sprung from Prague’s most ancient mythology. As the plot expands into London and New York, Langdon desperately searches for Katherine . . . and for answers. In a thrilling race through the dual worlds of futuristic science and mystical lore, he uncovers a shocking truth about a secret project that will forever change the way we think about the human mind. ||||

## Reception

The series has sold over 120 million copies.

## Film and television adaptations

The novels were a success around the world and became bestsellers, and soon adapted into films in which Ron Howard directed and produced 3 of 5 novels: The Da Vinci Code (2006), Angels & Demons (2009), and Inferno (2016), with Tom Hanks portraying the lead character, Professor Robert Langdon. All three were released by Columbia Pictures.
The novel The Lost Symbol was adapted in 2021 by Peacock with Ashley Zukerman playing the lead character, Professor Robert Langdon. The series has 1 season containing 10 episodes. In January 2022, Peacock canceled the show after only 1 season, which will continue to be available for streaming.