It takes Xas a few moments of raised eyebrows to recover - not from surprise at the specific offer, because he's already learned how kind people can be, so much the reminder that this is his life now, walking alongside people and having needs they can fill. It was always the other way around, before.

"Okay. Thank you," he says once he's resettled, without pretending to have to think about it or to be to proud, then smiles. "But if you give me your address, you won't be able to stop me from leaving books at your door."