Dispensers on Chiseled Bookshelves: Last In, First Out

Chiseled Bookshelves are really cool! But what I think could make them cooler would be if you could use Dispensers and Droppers on them. Droppers place a book inside, and Dispensers take out the last book placed inside. This could be useful for all kinds of stuff.

I would compare this to the Stack, an abstract data type in which the last item added is the first to be removed. This could be really useful for technical redstone (even though I'm not much of a redstone builder myself).

But of course, this would only be useful if you're a redstone master. However, this could serve other purposes.

Whether it's organizing your books or simply just putting them all away, I could imagine this being really useful.