Presently, I’m reading a library book. You don’t have to know the title.
It isn’t a terribly enlightening book, but I’ve learned one thing: A previous reader likes to eat while reading.
It isn’t a children’s book. The culprit was likely old enough to know better.
When you borrow any book, be ready to take more precautions than you would with a damaged paperback you buy at a garage sale. Whether or not the next reader knows who you are, your treatment of that book reflects on your respect for others.
This rule applies to anything you borrow, but you know that.