The Secret of Secrets – Dan Brown

The Secret of Secrets is Dan Brown’s long-awaited sixth Robert Langdon thriller, published on September 9, 2025. In this nearly 700-page novel, Harvard symbologist Robert Langdon teams up with noetic scientist Katherine Solomon in Prague to stop a shadowy conspiracy and recover her explosive manuscript. When Katherine disappears and the document vanishes, Langdon races across Prague, London, and New York, confronting coded mysteries, mythical threats (including a modern-day golem), and revolutionary insights about human consciousness. The story blends Brown’s signature fast-paced puzzle-solving with rich historical and architectural detail.