Looking around for books, for Transfiguration, he wonders where the Lion, Witch and the Wardrobe one was. He remembered reading that a few years ago, and thought that might be a good one, to use since he knew the story fairly well.

Finally after a long search JD finds the book in the top corner of one of the shelves. Covered in dust, he sneezes, when he pulls it down.

Rarely used, I take it... he thinks amusedly to himself.