I saw the author speak a few years ago at a Travel and Adventure Show and thought she had some useful tips and tricks for solo female travelers. I recently came across her website again and decided to give this book a shot.
If you're a woman who has rarely traveled at all, much less solo, this book may have some practical pieces of information for regarding travel in general. There are also several good websites and sound pieces of advice. I would caution you, though, that things change rapidly in the travel industry - which means that some of the information in this book is now outdated. For example, Northwest Airlines hasn't existed for a decade (Delta absorbed them in 2008), paper airline tickets were eliminated that same year, and you'd be hard-pressed to find anyone who actually uses or accepts traveler's checks anymore.
I consider myself a very seasoned traveler, so this book didn't really have too many new tidbits for me and I did skim quite a lot of it. I did enjoy some of the 'stories from the road' and other anecdotes, though, and it's always good validation to read that others use some of the same tactics and tricks that I do when traveling solo.