One of my best friends has always been a pretty mighty evangelist.
One of his secret powers is to borrow stuff from people he is getting to know. Books. Films. Articles. Stuff. Stuff that he can learn from the other person. Stuff that shows he cares about them. Stuff that adds another dimension to their relationship. Stuff that gives him the opportunity to respond to as a Christians at some later point. Stuff that gives him leverage to lend something back.
He shows interest. He borrows stuff. And he actually reads it.