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Gabriel Allon's nightmares come back to haunt him in this tense thriller from #1 New York Times bestselling author Daniel Silva. Art restorer and sometime spy Gabriel Allon is sent to Vienna to discover the truth behind a bombing that killed an old friend, but while there he encounters something that turns his world upside down. It is a face a face that feels hauntingly familiar, a face that chills him to the bone. While desperately searching for answers, Allon will uncover a portrait of evil stretching across sixty years and thousands of lives and into his own personal nightmares..."