I'm reading a Mao biography at the moment when I'm commuting to and from work. The train I take for part of the way comes from the airport. So I get in and sit down next to an older man who cranes his neck to look at the book I'm reading. I hold up the book so that he can read the title and just like that we're having a conversation about Mao, good biographies and China - he had just come back from there after teaching three months at a university.
Usually, I prefer to be left alone. But somehow, conversations that start with books are always interesting.