The Secret of Secrets: A Novel (Robert Langdon)

a Novel

Dan Brown

September 9, 2025 · Hardcover · Doubleday · 704 pp

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First edition · ISBN 9780385546898 · English · LC BF639 .A676

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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.

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• 2017Origin

  Robert Langdon, Harvard professor of symbology and religious iconology, arrives at the Guggenheim Museum Bilbao to attend the unveiling of a discovery that will change the face of science forever. The evening's host is his friend and former student, Edmond Kirsch, a forty-year-old tech magnate whose dazzling inventions and audacious predictions have made him a controversial figure around the world. This evening is to be no exception: he claims he will reveal an astonishing scientific breakthrough to challenge the fundamentals of human existence. But Langdon and several hundred other guests are left reeling when the meticulously orchestrated evening is blown apart before Kirsch's precious discovery can be revealed. With his life under threat, Langdon is forced into a desperate bid to escape, along with the museum's director, Ambra Vidal. Together they flee to Barcelona on a perilous quest to locate a cryptic password that will unlock Kirsch's secret. In their path lie dark forces which will do anything to stop them. To evade a tormented enemy who is one step ahead of them at every turn, Langdon and Vidal must navigate labyrinthine passageways of hidden history and ancient religion. On a trail marked only by enigmatic symbols and elusive modern art, Langdon and Vidal uncover the clues that will bring them face-to-face with a world-shaking truth that has remained buried - until now. —Publisher's description.

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More by Dan Brown

Deception Point 2002 · Paperback Angels & Demons 2003 · Hardcover The Da Vinci Code 2003 · Hardcover Digital Fortress : A Thriller 2004 · Hardcover Lost Symbol, The 2009 · Hardcover Inferno 2013 · Hardcover

Partial where an author was entered under two spellings — 34 such pairs are being merged in CLZ.