>>69087194Start talking to her about the book she's clearly interested in and ask questions about what she likes to read while on the train
Before her stop or my stop comes, tell her it's really fun talking with her, and ask if she wants to exchange contact info and keep talking later.
If she's actually just REALLY into that one book, offer to let her borrow it, and swap contacts so she can return it later and use that as the parlay