The Collector: The next thrilling book in the bestselling action-packed Gabriel Allon series from the author of PORTRAIT OF AN UNKNOWN WOMAN, THE NEW GIRL and HOUSE OF SPIESAfter the Carabinieri make a startling discovery in the Amalfi villa of a murdered South African shipping tycoon a secret vault containing an empty frame and stretcher matching the dimensions of the world's most valuable missing painting General Ferrari asks Gabriel Allon to quietly track down the artwork before the trail goes cold. The painting in question is The Concert by Johannes Vermeer, one of thirteen works of art stolen from Boston's Isabella