Hi

I think the most important thing is, you be yourself! If you try and be something you are not they will sense something is off! In a book store I guess you could ask them for a recommendation for a good book

The best way to engage anyone is to ask them questions about themselves...ppl LOVE to talk about themselves...well, usually lol

Good luck...sorry I haven't got much good advice but one thing I do know is ppl like other genuine ppl .... and also someone that takes an interest in who they are