When Professor Robert Langdon's mentor is brutally kidnapped, he realises the only hope of saving his friend is to follow the clues hidden in an ancient invitation. He is then plunged into a deadly race against time as he battles through a clandestine world of Masonic secrets, codes and hidden truths, all leading towards a shocking and unthinkable finale. This recording is unabridged. Typically abridged audiobooks are not more than 60 per cent of the author's work and as low as 30 per cent with characters and plotlines removed.