03068cam a2200661 i 4500 2687151401 TxAuBib 20260218120000.0 250131s2025||||||||||||||||||||||||eng|u 2025932069 9780385546898 hardcover 0385546890 hardcover (OCoLC)1493077938 TxAuBib rda Brown, Dan, 1964-, author. The secret of secrets : a novel / Dan Brown. First Doubleday hardcover edition. New York : Doubleday, 2025. ©2025. 675 pages : illustrations, map ; 25 cm. txt rdacontent n rdamedia nc rdacarrier cri rdacontent rdamedia rdacarrier sti rdacontent rdamedia rdacarrier Robert Langdon ; 6 Maps on endpapers. "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."--Dust jacket flap. 20260223. Langdon, Robert (Fictitious character) Fiction. Langdon, Robert (Fictitious character.) fast College teachers Fiction. Women scientists Fiction. Symbolism Fiction. Consciousness Research Fiction. Mind and body Research Fiction. Missing persons Fiction. Mysticism Fiction. College teachers. fast Women scientists. fast Symbolism. fast Consciousness fast Research. Consciousness. fast Mind and body. fast Research. fast Missing persons. fast Mysticism. fast Thrillers (Fiction.) fast Action and adventure fiction. fast Novels. fast Fiction. fast Action and adventure fiction. fast Robert Langdon ; 6.