People use some strange things to mark the pages in their library books. Usually it’s just their library receipts, but not always. I’ve come across letters, business cards, and receipts of what I would deem a ‘delicate’ nature. Bear in mind that someone’s personal medical history doesn’t improve the desirability of a book…or, at least, it shouldn’t. I’ve even come across funeral home mementos. I suppose if ‘Uncle Pete’ can’t be with us on earth, his memory can live on between pages 72 and 73 of a good murder mystery. Some people even leave money in books! Since I don’t know many patrons with the surname Rockefeller, I assume this money will be missed. So be careful what you leave in books! We can’t always catch these unintentional additions to our reading materials.