I'm the child of someone who accumulated books, not necessarily old ones but plenty of used ones. You should let people read books, that's the whole point. I often went into his office and pulled books off the shelf to read. If it weren't for that I would have never learned to program or learned a lot of the advanced math I did at an early age. I don't think people appreciate just how nice having easy access to physical books is, especially as a child. This was well after I had easy access to the internet too, modern technology doesn't really change this.