You see? Characters in books do not read books. Oh, they snap them shut when somebody enters a room, or fling them aside in disgust at what they fancy is said within, or hide their faces in one which they pretend to peruse while somebody else lectures them on matters they'd rather not confront. But they do not read them. 'Twould be recursive, rendering each book effectively infinite, so that no single one might be finished without reading them all. This is the infallible message of discovering on which side of the page you are on.