The passion for the subject and the depth of the research overcomes the danger of attempting to cover as much as possible on the subject (film-music history). Given two volumes it would be amazing, and perhaps then Cooke could become the first to take on the last fifteen years of history (so far too daunting for anyone it would seem). I would recommend this book to anyone who is interested in a broad perspective on the whole picture, which includes great coverage of film-music made in places far from Hollywood. If you are looking for a deeper look and analysis into certain aspects of the history, you might find Film Music: A History a more thoughtful read. And if its "cheap and cheerful" you want, it's hard to beat Film Music: A Very Short Introduction (Very Short Introductions). If you are a film-music fan... you need them all :-)
But I'm not opinionated (no, sir).