Lucia, now you tell me! I will look for the book and see if it something I want to own. You know, those teachers and my folks pounded addition and times tables into me for a reason, so using that for quilting doesn't seem such a stretch for me. The truth is that a dollar store calculator is my best friend in the sewing room. It really isn't all that difficult, and sometimes saves fabric. when I'm short on money. Figuring what you need for yourself, is the first step in making a designer out of you. The next step will be easier, making changes to a layout and how to figure what pieces are needed for an on point set. Believe me, we all have these skills and the knowledge, it just been pushed to a back file cabinet in our minds. We are Quilter's! We don't need no stinking books! :lol: Ok, sometimes we do. This house is full of them. :lol: