Getting your Trinity Audio player ready... Whenever I see someone reading in public, I’ll ask them about the book if it doesn’t seem intrusive (I mean, they’re reading, so I try not to bug people). This week, I thought I’d share one of these conversations, which took place at a movie theater. Here, in a conversation edited for length and clarity, Lynn in Pasadena talks about “The Wall,” by Marlen Haushofer, translated by Shaun Whiteside (New Directions). Q. Can you tell us what the book is about?