It does give you some hints, but it isn't that technical. It's more an "imitate me" book than a "understand it" book. To me it wasn't very illustrative...The exercises are a little bit ridiculous, so it's kind of hard to try to practice if you don't want to bother any nearby person or neighbor, or if you get easily embarrassed.Right now I'm reading "The New Voice: How to Sing and Speak properly" and it seems more reasonable, it talks about making your voice before singing, instead of making it as you sing... like in this book.I will give it a 2, because it does help you improve, but this book doesn't cover the "understand everything that is happening" part good enough for me.