I really, really enjoyed this audiobook. It's well written, well narrated and there are some wonderful examples, if not only to tantalize an appetite to research more. Perhaps the history of classical music isn't a topic one would normally choose in an audiobook, but I found it interesting as a historical framework for much that has to do with western music and enjoyed understanding a little more about the chronology of events; which composers were contemporaries of each other, and who inspired by whom; and, at least the author's opinion of some of these composers' personalities.
It's impossible to summarize 2000 years of culture in 5 hours. With that in mind, Fawkes does about as well as anyone could. Beside the length, the only major flaw is an over-emphasis on English composers. For example, Edward Elgar receives more consideration than Cage and Stockhausen combined. And the medieval/renaissance periods were far less centered on Britain than Fawkes would have you believe. Nevertheless, the book is a worthwhile review and the listening snippets are fabulous.
And I must add that Richard Fawkes is the first who so clearly manages to define the concept of atonality as well as the person who offers the wisiest view of the music of the Twentieth century.