I disagree with the people here that say the peices will make you sound better than you are. What you get with this book is peices that bring out the beauty of the *sound* of the guitar. Most people, including us guitarists, are just suckers for the open ringing you get so easily with a (decent) guitar and that is what these peices exploit. If you play these peices you will not sound like a pro (at least not to a musician, maybe to your grandma). You will, on the other hand, sound....lovely.
So, I recommend this book one hundred percent to a beginner who can play a few chords competently and wants to get into fingerstyle. But if you can play with you fingers a little already, look around for a slightly more advanced book.