I have checked them all out from the library and the one I liked the best and ended up buying is "Dr. Atkin's New Diet Revolution". I just found it to be the simplest to follow, low carb is explained well, and the actual diet in this book I have had the best results with. This book is from before all the Atkin's bars and shakes went on the market, so it doesn't talk about sugar alcohols. I don't use the Atkin's products anyway (too expensive) and I just make my own low carb desserts when I need a sweet or chocolate fix, so I don't know if they work. If you want to use the Atkin's products regularly, you should probably read the newest book first, "The New Atkins For A New You".