The first few chapters of this are really good. After that it is, at best, outdated; at worst, irresponsible. Although, the first few chapters are worth the price of the book. They provide a good, rational, well-thought look at the day-to-day reality of personal finance. There is nothing there that most people can't figure out on their own, but most of us don't.
As for the rest of the book, first of all, it was evidently written in 2004. My edition was copyrighted in 2007. The world has changed, especially with respect to personal credit, credit card interest rates and credit card companies' in-house policies regarding things like interest rate reductions.
Parts of the book are irresponsible. The author makes the point when ranking the consequences of what debt to pay and speaking about collectors for credit cards:
"Because other than damaging your credit rating and your credit score (not the best scenario in the world, but also not the worst), there's very little these lenders can do to you. There's no collateral behind the money you owe them. There's nothing they can even try to take from you. . . . For now, it's their loss."
Well, in my State, they can sue, take a judgment against you and start garnishing your wages taking 25% of your GROSS income until paid including attorneys fees, interest and court costs. Now, I agree with the point that she is making -- food, utilities and taxes should come first; but at that point she should advise people to make sure that they understand what collection tools are available to collection agencies in their State.
Other parts of the book are simply naive, like her lack of understanding of mortgage securitization -- but then, very few people had any real understanding of that in 2004 when this book was first written. Parts of the book are incomplete. She discusses the advantages and disadvantages of debit cards v. credit cards without mentioning the different sets of legal rights, responsibilities and protections behind them.
Read the first chapters of this book, but once you start reading anything with legal consequences, do your own research.