The gripping third novel in Daniel Silva's trilogy, following on from The English Assassin and The Confessor.

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.