I bought it. I've made two bowls - both just from pine as I didn't know how they'd go. They came out surprisingly well. I've only been scrolling since December so am far from expert. I plan to venture on to one made of cherry or walnut sometime in the near future. I think it will look nice.
She does a good job of explaining what you need and she also has a number of youtube videos so you can see her do at least some of the stuff. The book presents a pretty wide variety of ideas. She spends a lot of the book on laminations. Maybe I'll get to that one day. I don't equipment like a table saw and, while she says she cuts all her pieces on the scroll saw, I don't think my pieces would fit together as nicely as hers do (yet!).
The really great thing about the book, IMO, is that she explains how it all works so you can create your own bowl patterns. Her basic bowl, for example, is nice enough for display but it is small. I could make a bigger one just using inkscape or something or I could make something in a slightly different shape. She shows you how to calculate the right table angles so you can be sure the pieces will fit together.
So I am not up to the level where I can take full advantage of all her patterns but I don't regret buying the book a bit. I figure I will eventually grow into what I can't do now and, in the meantime, I can make some pretty decent - if less fancy - bowls.