On 9 September 2025, bestselling author Dan Brown released his eagerly awaited new thriller, The Secret of Secrets, to a global audience. In this novel, Brown takes readers on a journey through Prague’s most stunning and historically significant landmarks, as well as its hidden corners (for instance the Crucifix Bastion). Against the backdrop of the Czech capital, the gripping story follows Professor Robert Langdon as he confronts mysterious forces, intelligence agencies, and an international conspiracy.