"I have tried at least three or four different vocal books, imported the CD into my iTunes, use them for a few days and become bored, EASILY! With "Your Singing Voice" I've been using it non stop for months now. Jeannie explains everything so clearly explained and well written, and there is so many different exercises, you can't really get bored. This book really is a MUST for anyone interested in singing, both professionally and for fun!" -Amazon.com review