The opening paragraph of Mr. Penumbra’s 24-Hour Bookstore is a doozy:

Lost in the shadows of the shelves, I almost fall off the ladder. I am exactly halfway up. The floor of the bookstore is far below me, the surface of a planet I’ve left behind. The tops of the shelves loom high above, and it’s dark up there—the books are packed in close, and they don’t let any light through. The air might be thinner, too. I think I see a bat.