Big problem I had with this book is Labelle's style of writing. I felt like I was back in my intro to philosophy class being forced to dissect every sentence to obtain the meaning from it. He then had a habit of adding "In other words" at the end of this long rants that he would go on. I guess to help the poor "lamen." If you feel like you need to add a dumbed down version of what you just said for the sake of your audience, then you should probably rethink exactly who you are writing this book for. I seemed verbose for the sake of being verbose.
I did find the "People or Plants" section of 4'33" very interesting. By actually engaging the audience in the piece, making them a part of it rather than a passive element, I think that Cage does a wonderful job of breaking the barrier between audience member and participant.