Replying to
@tante@tldr.nettime.org @AudhdDespiteNoisyAbleism@ottawa.place (librarian here) : we destroy books when they are old and we buy new ones with the same content. Or it's inacurate like a old travel guide or the content is not that unique like a recipes books.
Also working in public library the rules are : if x new books arrive in the shelves, x old books must leave.
Aniway, if someone really care about books, it should be about the content not the physical object.