I have all 4 of Harriet's books - I think they contain a great amount of information. My books are very heavily highlighted. I been piecing for a long time and feel all of us can use a refresher course. This series takes you from the beginning - the why/why not wash, cutting, stitching, and goes all the way to designing your own quilts. She shows different ways of doing the same thing - you try each one and decide what works best for you. The books also give examples for quilting each quilt. Book 5 will be out in 2014 so I'm hoping I can work my way through her books by that time. If I could only have one set of books then the Quilter's Academy series would be the books I would choose.