Not a lot I can say about this inventive little product other than the fact that it is really, really cool. And the fact that you can pick these up at any Container Store for $7.50 doesn’t suck either!
Basically one large book “hooks” into the wall mounted bracket and you then stack other books on top of it.
I imagine that this would look quite impressive, assuming you had enough wall space to put a few of these across it with some really nice books. People would probably think that you must be well educated and cultured, even if you just use trained monkeys (like me) to do your readin and writin for you.