group
I remember accidentally damaging a few books (that darn waterbottle wouldn't stop leaking) and I know that where I am you keep the book and you might've had to pay a fine but I don't remember if so or how much it would've been. (maybe enough to buy a new copy for the library?)
One of my friends dropped a library book I'd checked out into a lake.
I got her to pay for it though so I didn't have to lol