Robert Langdon 6: Secret of Secrets - Dan Brown (US Hardcover) - September 9th, 2025

RELEASE DATE ----- September 9th, 2025 ----- Pre-order now and we'll save you a copy!

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.