Actually some goat-skin books were recycled for new books. Existing parchment with uninteresting texts was cheaper than acquiring new parchment. Sometimes the s

Actually some goat-skin books were recycled for new books. Existing parchment with uninteresting texts was cheaper than acquiring new parchment. Sometimes the scraped old text is faintly or can be seen with hyperspectral imaging. There was some famous Greek author whose work is only know this way. Lots of books are referenced in other books, so ther eis some idea of what is missing.