For reference purposes, I love "Quilter's Complete Guide" by Fons and Porter and "The Quilters Ultimate Visual Guide: From A to Z" ... both are great! But when I just want to be inspired, I love books with just tons of quilt blocks in them. They don't have traditional step-by-step patterns, but can be easily done up with graph paper or a quilting software program, like Electric Quilt. The top ones I love are: "The It's Okay If You Sit On My Quilt Book" by Mary Ellen Hopkins, "849 Traditional Patchwork Patterns" by Susan Winter Mills, "5,500 Quilt Block Designs" by Maggie Malone, "Once More Around the Block" by Judy Hopkins, and "101 Nine Patch Quilts" by Marti Michell. I have over 100 quilt books and order most of them "used" through Amazon and I've never had a problem with any of the transactions.