Meaning between the lines or between the books?

In a New York Times Book Review of "How to talk about books you haven't read" by Pierre Bayard, the reviewer quotes this passage:

Being cultivated is a matter of not having read any book in particular, but of being able to find your bearings within books as a system, which requires you to know that they form a system and to be able to locate each element in relation to the others.

I think that is a helpful concept to share with students; that as readers we have an active role in authoring our own meaning from the selection of the books that we read.