I've only made one tee shirt quilt and I am thrilled with it. I did not use a pattern or book, just some advice from friends and on line. Fusible tricot interfacing worked well for me. Follow good advice of Maryb in this thread. A few of the shirts were old or thin, so the interfacing was important. Tee shirt quilts are a bit heavy, so I used a light bamboo-cotton batting and a cotton backing, no flannel. Have fun.