The Lion, the Witch, and the Wardrobe
How we cite our quotes:
This house of the Professor's—which even he knew so little about—was so old and famous that people from all over England used to come and ask permission to see over it. It was the sort of house that is mentioned in guide books and even in histories; and well it might be, for all manner of stories were told about it, some of them even stranger than the one I am telling you now. (5.46)
The tourists who come to see the Professor's famous house function as a subtle foil to the children who explore the same territory. The tourists only see what they expect to find based on their guidebooks, while the children find much more.
The coats were rather too big for them so that they came down to their heels and looked more like royal robes than coats when they had put them on. But they all felt a good deal warmer and each thought the others looked better in their new get-up and more suitable to the landscape.
"We can pretend we are Arctic explorers," said Lucy.
"This is going to be exciting enough without any pretending," said Peter, as he began leading the way forward into the forest. (6.21-23)
Lucy, the youngest, is still ready to treat Narnia as a child's adventure game, but Peter has realized that they are starting off on a much more important quest.