I haven't discovered what this means and think I need to ask Laura. All I can say this is one of the best books I found so far. The attention to detail in its construction is beautiful, and the content even better. The front cover has a profile that has the texture of rubber, and the cover itself is made from a weaved material. Internally the pages have a rough feel slightly like a newspaper but thicker— exquisite design.
MON.TOR.IST.EN