This is _the_ book to acquire if you are planning to make vegetable oil based soap. There's a lot of information packed in this book. It presents all the elements of soapmaking very systematically, and explains the simple chemistry and logic behind the recipes and techniques. It specializes on the best ways to make vegetable oil soap -- which can differ from animal fat based soap. I'm a beginner. I made my first batch last night and it is happily solidifying in the molds as I write. I would buy this book in addition to whatever other soapmaking books you feel inspired to buy, because it covers just about everything and is a really good reference. It includes a large appendix of suppliers and a reassuring table of what to do when things go wrong. My only complaint is that it doesn't have a good description of what "tracing" looks like -- tracing being the sign that your soap is ready to pour into the molds. But, none of the other books I read did either. It's subtle, and I think it's the sort of thing you learn to recognize after you've made a couple of batches. Note that each of the eight basic recipes makes 40 bars of soap, so be prepared to share with friends!! If the amount of info in this book seems a bit overwhelming, beginners might also want to consider picking up a copy of Ann Bramson's book.