The Secret of Secrets: A Novel

The Secret of Secrets by Dan Brown, the sixth Robert Langdon novel released in September 2025, has generated considerable anticipation and mixed early reception among readers. Set in Prague, the 688-page thriller follows Langdon as he searches for Katherine Solomon after she mysteriously disappears along with her groundbreaking manuscript on human consciousness. Early Goodreads ratings show a strong 4.80 average from 15 ratings, though this reflects a small pre-release sample. Readers express excitement about the return of Katherine Solomon from The Lost Symbol and the Prague setting, with its rich historical backdrop of castles, churches, and underground passages providing what reviewers describe as atmospheric and compelling scenery.

Reviewer feedback reveals familiar patterns in Brown's work. Those who have read advance copies note the book delivers the expected Dan Brown formula: fast-paced action, historical symbolism, art and architecture integrated with scientific speculation, and codes woven throughout monuments. Hannah's 4-star review on the Play Book Tag forum praised the "brisk pace, high-stakes chase, interesting locations" and the way "myth, science and thriller formula works well." However, some readers note the novel feels "stretched" at times, with character depth sacrificed for momentum. Jason's 3-star review appreciated the educational aspect of learning about symbols but found the experience less impactful. Multiple commenters acknowledge they expect the book to follow Brown's established patterns, with one reader stating "I expect this to very bad but I will still read it," suggesting loyal fans will read regardless of quality concerns.

The 688-page length has prompted mixed reactions, with one reader asking "is Dan Brown trying to kill me?" while others view it as an exciting long ride. Discussion topics reveal concerns about product placement, with a forum thread titled "What is with all the product placement!" generating conversation. The book's focus on noetic science and human consciousness, combined with Rosicrucian secret society elements, provides thematic weight that some readers find thought-provoking, though others worry the science leans toward sensational rather than grounded speculation.