As a musicals nerd and teenage choir member, it was pretty much guaranteed that at some point I'd buy this book and have a go at it. "How badly can you mess up a simple music book, right?" Let me count the ways....
First, the songs in the book. I'm afraid the editors really didn't think it out when they started choosing what musicals would even go into consideration. I've been raised on musicals, but a good half of the songs selected for the book's targeted, "teen" audience were from musicals that are either very or or very obscure. I can assure you that most teens wouldn't know more than a handful of the songs listed.
Second, the CD. You would think when you're paying more than $18-$20 for a single music book, the publishers could afford to hire someone (a teen, a young woman, etc.) to sing for the supplementary CD. Instead, the CD is not only just a recording of bad midi files but also out of time with the book. The publishers should have taken a note from Suzuki and recorded a CD that challenges the student and supports the material on the page - not create something that is somehow worse than the book itself.
Overall, a poor, poor music book for pretty much any "young," female, "teens." It looks very shiny in the store and on the product pages, but give it a few days of practice, and you'll see how it manages to hit all the wrong notes.