Art restorer and spy Gabriel Allon is sent to Vienna to discover the truth behind a bombing which killed an old friend - a Nazi hunter.
While there he encounters something that turns his whole life upside down.
Each fact he uncovers only leads to more questions until finally a picture emerges which is more terrible than he could have ever imagined - a portrait of evil stretching across 60 years and thousands of lives into his own personal nightmares.
Daniel Silva is the bestselling author of The Unlikely Spy, The Mark of the Assassin, The Marching Season, The Kill Artist, The English Assassin, The Confessor, A Death in Vienna, Price of Fire, The Messenger, The Secret Servant,Moscow Rules and The Defector. He lives in Washington, DC, with his wife, NBC News Today correspondent Jamie Gangel, and their two children, Lily and Nicholas.