Nice, altho i've had some problems during installation and getting errors, think its because i might have the wrong version of one of the dependencies, Would be REALLY nice if there was link to the current version of each dependencies..
Don't know if its intended or not, but i can place any item inside the shelves, would be awesome if it was limited to books =)
Very exceptional script, does exactly what it says. I think you should add permissions to then open a bigger or smaller chest-inventory when you rightclick on the bookshelf. (I'd be willing to help you on this, I am a skript developer)