Changes. Using music to explore post-war British youth culture

Well, once upon a time a crazy man wrote an awful novel about wizards and talking eyes. Then he wrote another one not quite as awful as the first. This is that one; the sequel. It's also about wizards and talking eyes but in this book they travel back in time and have wacky adventures and stuff. So if you haven't already read the first one, go read it and if you don't absolutely hate it, maybe read this one next.