(Pre-Order) The Secret of Secrets (Robert Langdon #6) by Dan Brown (Shipping from 9/9/25*)

The world’s most celebrated thriller writer 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.

US Edition Product details

Publisher ‏ : ‎ Doubleday (September 9, 2025)

Language ‏ : ‎ English

Hardcover ‏ : ‎ 688 pages

ISBN-10 ‏ : ‎ 0385546890

ISBN-13 ‏ : ‎ 978-0385546898

Item Weight ‏ : ‎ 2.2 pounds

Dimensions ‏ : ‎ 6.13 x 1.06 x 9.25 inches

UK Edition Product details

Publisher ‏ : ‎ Bantam; 1st edition (9 Sept. 2025)

Language ‏ : ‎ English

Hardcover ‏ : ‎ 688 pages

ISBN-10 ‏ : ‎ 1787634558

ISBN-13 ‏ : ‎ 978-1787634558

Dimensions ‏ : ‎ 15.6 x 2.8 x 24 cm

* Subject to Publisher's Delay