The Secret of Secrets: A Novel

Dan Brown

Sep 2025 · Robert Langdon Series Book 6 · Sold by Doubleday

About this ebook

INSTANT #1 NEW YORK TIMES BESTSELLER • The world’s most celebrated thriller writer and author of The Da Vinci Code returns with his most stunning novel yet—a propulsive, twisty, thought-provoking masterpiece that will entertain readers as only Dan Brown can do.

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.

Ratings and reviews

I'll be honest, not his best work. The story is intriguing and exciting, but honestly I feel like Robert Langdon the cryptographer isnt used the same as previous books. In previous books he did a ton of deciphering of symbols to find clues , but in this book he's mostly being reactionary. very little cryptography at all, short of a few stretches that clearly was Dan Brown saying "I want Langdon to end at point B how can we flub it to make that happen?". I dont usually say a book wasn't worth my time or money, but in this instance, I will say its just not Brown's best work, which kinda sucks considering how long we waited for another Langdon book and how excited I was for it. Shame.

Good writing, keeps you hooked. However, it could have used another couple rounds of editing with some characters being cut or better utilized. Also, Brown has a bad habit of showing instead of telling, and repetitively doing so (we know Katherine likes to buck the academic consensus, we understood that 20 pages in, no need to keep reminding us). While I found the stuff the CIA was working on somewhat interesting, the whole premise of the book is a bit contrived, same with who the Golem is. Not to mention, the publisher character becomes redundant a quarter through the book and then is strung along He's also a little cringe. Regardless, the book kept me hooked for a weekend and explored topics that are kind of interesting.

Great book as always. Not as much puzzles and decoding unlike previous books but the new concepts introduced here kept me hooked.

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.