Portrait of a Spy

455 pp. For Gabriel and his wife, Chiara, it was supposed to be the start of a pleasant weekend in London - a visit to a gallery in St. James's to authenticate a newly discovered painting by Titian, followed by a quiet lunch. But a pair of deadly bombings in Paris and Copenhagen has already marred this autumn day. And while walking toward Covent Garden, Gabriel notices a man he believes is about to carry out a third attack. Before Gabriel can draw his weapon, he is knocked to the pavement and can only watch as the nightmare unfolds.