In the early days of the new millennium, pages of a worn and weathered original sonata manuscript--the gift of a Czech immigrant living out her final days in Queens--come into the hands of Meta Taverner, a young musicologist whose concert piano career was cut short by an injury. To Meta's eye, it appears to be an authentic eighteenth-century work; to her discerning ear, the music rendered there is commanding, hauntingly beautiful, clearly the undiscovered...