Fascinating.
Slightly off-topic, but there is a solo RPG game called "The Thousand-Year Old Vampire" where you have a diary but may choose whatever medium you wish for it, vase, stone tablet, blanket. Rather fitting as you may begin in the time of the Pharoh's for example before bookbinding.
"The pair found that, in addition to etching lines in the rock, the creators of the map modified its surface to create a topography matching the landscape." How fantastic, thanks for sharing.