Shop, Save, and Share by Ellie Kay (2004, Paperback, Updated)

This book is funny, easy to read, and has revolutionized my spending! I was already a money saving stay-at-home mom of four (so I thought). But after reading this book, my grocery bill has gone from $160-180/week to $60-80/week with just a couple hours a week time investment. (That's a like having a $50/hour job!) I have also been able to share my knowledge, and my unneeded coupons to help others save. My kids even love the system. (5 cake mix and icings for .50 cents a set means mom bakes cake more, instead of expensive prepackaged snacks, and they would far rather help in the baking AND have the homebaked cake.)
BOTTOM LINE: Reading this book has saved me enough to pay my van payment every month, and helped us to simplify and focus our spending. For that we are so grateful.
I cannot thank you enough, Ellie Kay. I am reading my third Ellie Kay book in a month right now.