[He notes the smile, but doesn't reciprocate. However he does try and look more friendly. It's... a bit of a feat, given how intimidating he usually looks, but he's trying.]

Both. [Wait.] One book is just for me, but I'd also like two copies of a different book for both myself and my son. He's into western-settings while I'm more interested suspense and mystery.

[Admittedly he's...not sure how helpful he's being, but if she wants to know more he's willing to work with her.]