Not since Paganini had there been such a magician on the violin. Jascha Heifetz was the first truly modern virtuoso, a man about whom Itzhak Perlman said, 'When I spoke with him, I can't believe, I'm talking to God'. Heifetz was a legendary but mysterious figure whose story embodies the dual nature of artistic genius. The paradox of how a mortal man lives with immorta...