Add components feature

Sometimes I need to render a scene with multiple copies of the same object, say - a hard cover book. When I create the first copy, I then duplicate it several times and create a template for that scene. The next time I need to use that scene, with a different book cover - I have to replace each and every one of the covers and that is very time consuming and sometimes a bit hard to reach on the scene.

I wonder if a single completed book (with all it's parts - front cover, spine, head and tail bands, endpapers, etc.) could become a component, and once you duplicate it - each change to the component will affect the rest of the copies of that book in that scene.