I worked at a take away shop in Australia (a Ma & Pa shop that sold fish, chips and pizza). The store was always closed on a Monday but the owner and a couple others would usually come on to do orders and prep.
The main lights were always off and the chairs are stacked near the door so you’d have to push past them to get in. But every time, without fail we’d still get a half dozen people pop their heads in and asking “are you open?”.
One day, the owner sliced his hand badly and had to rush to hospital. They took off so fast they forgot to lock the door and left the place unattended.
When they got back (very late at night), there was precisely one drink missing from the fridge, and $3 left on the counter.
I don't mind the odd wholesome news but this is a bit overhyped and absolutely non-news.
It is not like the library has any security personel watching people on normal days and if they have alarms for when people walk out with non-checked out books, they probably do, I am sure those would have gone off like on any other day as well.
About the book borrowing and returning, well you can do that completely without staff helping you, so how is that something notable? And if you are officially checking out something you are obviously a person who is going to return it.
The only thing that I think is notable that potentially no one attempted to steal books. Then again, why would you, it is used books from a library you can read for free.