Having tossed many of those books in the past, I would say if the paper peels off, use it. If the paper sticks, just toss them. Once, you receive those books, most designers will be happy to give you more when they become outdated. Our guild made tapestry bags out of the larger 12 x 16 samples and even used the grommets to string the straps of the totes. We sold them in the boutique at the Quilt Show. Some turned out really nice since the fabrics could be coordinated.