The Secret of Secrets” follows the story of Harvard symbologist Robert Langdon as he races against time to find his disappeared love interest, Katherine Solomon, in the ancient and mysterious city of Prague. Langdon must use his expertise in arcane knowledge to decipher the secrets of the city and face a dark past that threatens their lives. With a backdrop of castles, churches, and underground passages, Langdon navigates a shadow city hiding in plain sight, where treachery and deception lurk at every turn. As he battles against forces unknown, Langdon must not only fight for his life but also for the future of humanity itself. Dan Brown’s long-awaited novel brings back Langdon in a gripping thriller that tests his intellect and resolve like never before.