Introduction
If you’re a fan of fast-paced thrillers that mix history, art, religion, and science, chances are you’ve come across Robert Langdon, the Harvard symbologist created by bestselling author Dan Brown. With millions of copies sold worldwide and several movie adaptations, the Langdon novels remain some of the most popular thrillers ever written.
In this guide, we’ll show you the Robert Langdon books in order — updated for 2025 to include Dan Brown’s brand-new release, The Secret of Secrets.
Robert Langdon Books in Order
1. Angels & Demons (2000)
Langdon’s debut adventure introduces readers to the world of religious symbolism and secret societies. In this novel, he is called to the Vatican to investigate the Illuminati, uncovering a conspiracy that could shake the Catholic Church.
2. The Da Vinci Code (2003)
The global phenomenon that made Dan Brown a household name. Langdon investigates a murder in the Louvre and discovers clues hidden in Leonardo da Vinci’s works, leading to revelations about the Holy Grail and ancient secrets of Christianity.
3. The Lost Symbol (2009)
Set in Washington, D.C., this novel dives deep into the world of Freemasonry. Langdon searches for his missing mentor, Peter Solomon, while unraveling hidden symbols in America’s capital. It’s also the book that introduced readers to Katherine Solomon, who plays a crucial role in the 2025 novel The Secret of Secrets.
4. Inferno (2013)
Inspired by Dante Alighieri’s Divine Comedy, Langdon wakes up in Florence with amnesia and must solve a puzzle that could affect global survival. This installment mixes literature, art, and a bioethical crisis, making it one of Brown’s darkest and most urgent thrillers.
5. Origin (2017)
Set in Spain, this novel tackles two of humanity’s oldest questions: Where do we come from? Where are we going? Langdon attends a presentation by futurist Edmond Kirsch, only to be drawn into a race to protect a discovery that challenges science and religion alike.
6. The Secret of Secrets (2025)
The newest and most ambitious novel in the series. Langdon travels to Prague to attend a lecture by Katherine Solomon, who is about to reveal groundbreaking research on human consciousness. When she disappears, Langdon is drawn into a global conspiracy that could change humanity’s understanding of itself forever.
👉 Read the full analysis of this novel in our complete guide to The Secret of Secrets by Dan Brown
Do You Need to Read Them in Order?
While each novel is a standalone story, reading the Robert Langdon books in order helps you appreciate recurring characters and themes — especially the reappearance of Katherine Solomon in The Secret of Secrets.
Recommended reading order:
- Angels & Demons
- The Da Vinci Code
- The Lost Symbol
- Inferno
- Origin
- The Secret of Secrets
Conclusion
The Robert Langdon series remains one of the most beloved thriller collections of the 21st century. With the release of The Secret of Secrets by Dan Brown (2025), fans now have a fresh mystery that blends ancient history with cutting-edge science.
Whether you’re starting with The Da Vinci Code or catching up to the newest release, reading the Robert Langdon books in order will take you on an unforgettable journey through codes, symbols, and secrets hidden in plain sight.
