Drone-Copters With Grasping Arms

All Hail Eris #161: How does the good professor access books on the top shelves? I don't see one of those swooshy ladders on tracks and the stacks of books heaped in front of the shelves prevents good placement of a stepladder.
Maybe he shoots a grappling gun?

I see a market here for those little drone-copters with camera and grasping arms.

*lightbulb* Hey, they could be used to automatically inventory the shelves, too!