"The rules should be adjusted. Eleven thousandth."

The offer of books has its appeal. Wolfgang, anyway, is nerdier than her; they could have a library! But-- "I couldn't take your books! You should keep them. Or sell them, I suppose. But if you need a permanent address," because the assumption that Xas might not have one is easy for her to make, as having one at all is a new novelty, "you could just write down mine." Either Benji really isn't good at libraries, or she trusts Xas to be.

Both, mainly.