Incorrect. Book text is stored with the book item, in a similar way to enchantments.
Hm. Ok - I'll figure it out. I thought they were stored in level.dat, or stored in book.dat files similar to map.dat. I was afraid that I would have to manipulate them by hand (meaning with an external tool) because everyone would create a "book 1", "book 2", etc... and I'd have to manipulate them so that they didn't overwrite each other.
I think I see the general idea, but not sure if I recognize it.
What comes to mind is a scene from Final Fantasy Advent Children.
Haven't seen that movie, so nope That said, it doesn't come from any particular media. It's simply a garden/pond with a large horned frog. I'm gonna enjoy making the second level, though it'll be tougher redstone-wise...