In the book Angels and Demons, the American writer Dan Brown first introduced the character of the Harvard symbologist Robert Langdon, who then appears again in the world bestseller The Da Vinci Code. During a visit to Europe, Langdon is called to the case of a ritual murder, which he can help solve thanks to his knowledge of codes and encryption and the history of secret societies. A brutally murdered scientist is found at the top Swiss research institute CERN...