I have the pleasure of being able to use one of these at work and would absolutely love to have one for home. My dad has one of these and I think he found his at The Ubimall.
This book shelf is so much fun. It is extremly flexible that I startet to adjust it almost every month whenever I get a new book or poster. I love it.
Always be prepared. You may not be able to prevent scrapes and boo boos from happening but you can have the necessary tools handy and organized to manage the situation.