I am a beginner at guitar for the most part. I have a book called "Total Scales Techniques and Applications" by Mark John Sternal. I was wondering if practicing the lessons in that book would be worth while. Thanks.

>link to the book
http://www.amazon.com/GUITAR-Total-Scales-Techniques-Applications/dp/0976291789/ref=sr_1_1?ie=UTF8&s=books&qid=1247159817&sr=8-1