The music of Erich Wolfgang Korngold is nowadays probably something of a guilty pleasure. Most of us have, I imagine, cracked the old 'more corn than gold' quip as if it were our own, and have cast aspersions on the Violin Concerto (1945) to which it was first applied. Yet, at the same time, we have secretly luxuriated in the astonishing melody of the Concerto's second theme, probably unaware of its verbatim borrowing from Korngold's music for the film Juarez (1939), and almost certainly ignorant of the film-specific practices and processes through which that music came to be. The above is a crude snapshot of the many complex issues that Ben Winters explores in his excellent new Korngold book.