With much amusement, I’ve just removed a copy of Fifty Shades of Darker from our Kindle collection. Our library Kindles share the one account on Amazon as it makes it easier to keep track of the purchases etc. We usually allow staff to purchase items with the understanding that the kindles are used by students as young as 10 years old and that anything purchased on one is available to all of the others. The staff are usually pretty good about what they purchase..
This one slipped under my radar. I normally notice such things. Luckily, I spotted it before a parent or one of the students had chance to notice.