A New York Times Bestselling AuthorArt restorer and sometime spy Gabriel Allon is sent to Vienna to discover the truth behind a bombing which 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, yet chills him to the bone and sends him on an urgent hunt for a name, a history, a connection. This uncommonly intelligent thriller is filled with sharply etched characters and prose, and a plot of astonishing intricacy and resonance.