International bestseller Dan Brown, famed for The Da Vinci Code, returns with The Secret of Secrets, the sixth instalment in his Robert Langdon series. Slated for simultaneous global release on September 9, 2025, the novel ushers Langdon into the enchanting city of Prague, where a lecture by his love interest, noetics scientist Katherine Solomon, spirals into chaos—a brutal murder, her disappearance, and a thrilling chase through Prague’s hidden mysteries and beyond
Brown describes the book as his “most intricately plotted and ambitious novel yet—and also the most fun,” promising a narrative that merges futuristic science with mystical lore. The story will guide readers from Prague’s gothic soul into London and New York, all while exploring themes of human consciousness and powerful secret societies.
Combined with Netflix’s early adaptation announcement, Brown’s richly detailed Prague—and its culture, architecture, and symbolism—are poised to captivate both readers and travelers alike
Combined with Netflix’s early adaptation announcement, Brown’s richly detailed Prague—and its culture, architecture, and symbolism—are poised to captivate both readers and travelers alike