The artwork [pdf] on the back of their cereal box looks great*, and it certainly gets the point across (I think the "get rich" angle is odd, but I guess that's marketing). It seems fairly intuitive, lists useful facts, and also includes a nice library-related quote from Barack Obama.
*Also good is that it satisfies my cereal box rule: whatever is on the back of the box should be interesting enough to keep you occupied for as long as the cereal inside the box lasts. I mean, those little mazes they put on the back of some boxes might keep me occupied for the first bowl, but what about all the subsequent mornings I eat that cereal? See, if I were president philosopher-king, the world would be a whole lot different.