The Secret of Secrets: A Novel

Dan Brown

Sep 2025 · Robert Langdon Book 6 · Penguin Random House Audio · Narrated by Paul Michael

About this audiobook

INSTANT #1 NEW YORK TIMES BESTSELLER • THE NEW ROBERT LANGDON THRILLER FROM THE ICONIC AUTHOR OF THE DA VINCI CODE

“A master of the brainy, twisty thriller. . . . The Secret of Secrets is perhaps his most ambitious undertaking yet: a dense thriller that is also a meditation on the nature, and the possible future, of human consciousness.”—Los Angeles Times

“So riveting you’ll want to clear your calendar.”—USA Today

Robert Langdon, esteemed professor of symbology, has traveled to Prague to attend a groundbreaking lecture by Katherine Solomon—a prominent noetic scientist with whom he has recently begun a romantic relationship. Katherine is on the verge of publishing a breakthrough book that contains explosive scientific discoveries about the nature of human consciousness . . . revelations that threaten to disrupt centuries of established belief.

When a brutal murder catapults the trip into chaos, Katherine suddenly goes missing—and her manuscript disappears. Desperate to find the woman he loves, Langdon embarks on a thrilling race through the mystical landscape of Prague, ruthlessly hunted by a powerful organization and a chilling assailant sprung from the city’s ancient mythology.

As the action expands to London and New York, Langdon plunges into the dual worlds of futuristic science and historical lore—navigating a labyrinth of codes and symbols . . . and finally uncovering a shocking truth about a secret project that will forever change the way we think about the human mind.

Look for more Robert Langdon novels:
The Da Vinci Code
The Lost Symbol
Inferno
Origin

Ratings and reviews

worst dan brown book in the whole series. it was disappointing. I will not spend my money on another of his books. I will buy it used at a used bookstore. A waste of $35.00.

Good but, not great. Strong start and finish. Long middle.

A taut thriller with cool twists. Recommend.

About the author

Dan Brown is the author of eight #1 bestselling novels, including The Da Vinci Code, which has become one of the bestselling books of all time, as well as Origin, Inferno, The Lost Symbol, and Angels & Demons. His thrillers have captivated readers worldwide and been the subject of intellectual debate and speculation. He is also the author of the bestselling children’s book Wild Symphony. Brown’s novels are published in 56 languages internationally, with over 250 million copies in print.