First, I apologize because I don't have a review of the book you want to purchase. However, with so much information on the internet from DIY to Martha Stewart to Better Homes and all of the retailers, do you really need to buy a book about decluttering? The best process I have used is the bucket process when I had clutter on top of clutter. I had a bucket for each category and tossed things into the buckets. Once I saw what I had, I made decisions on whether to keep or not. Trust me, what they say is correct....if you haven't used it in 6 months, let it go unless it has incredible meaning to your life. Martha Stewart has great ideas for organizing once you separate the clutter. Also, I look at the high end retailers and home decor mags to get idea's on how to organize with some style and then I replicate it for less!! I am coming to the end of decluttering the last 10 years of my life, what a mess. I found places to donate to that would pick up and brought more valuable, newer things to consignment or pawn shops for a few bucks toward my reorganizing materials. It feels great!!! Buy the book if it intrigues you, it can't be bad. Try amazon.com, you can usually get used books, like-new condition even cheaper than a book store. Good luck!
My personal experience and research