From Daniel Silva, the internationally acclaimed #1 New York Times bestselling author, comes a riveting new thriller featuring art restorer and legendary spy Gabriel Allon. It was nearly one a. m. by the time he crawled into bed. Chiara was reading a novel, oblivious to the television, which was muted. On the screen was a live shot of St. Peter's Basilica. Gabriel raised the volume and learned that an old friend had died -- Gabriel Allon has slipped...