As a print designer, I accumulate a lot of paper sample books from various paper vendors and paper mills. These are referred to when selecting paper for a press project. Each spiral-bound book contains samples of papers at different thickness, color, texture, composition, etc.
Every so often - books are retired or replaced with new versions so I'm left with the old ones. Some go back to their vendor or mill for recycling. Many I save for the kids to use as sketchbooks. Here's Mabel's that she played with tonight. I tore out the printed pages with paper specifications on them and made a cloth cover.
I've got plenty more of these books if you want one - just let me know and I'll get one or two out to you... cheers,a.