I have a running conversation with one of the baggers at my local grocery store. Hardly mentally challenged, he is an 81-year-old retired engineer. He remarked one day on the healthy composition of my order and proceeded to tell me about a book he had just finished about where our food supply comes from and the path it takes to our table (it's called, The Carnivore's Dilemma). He agreed to lend me the book and left it for me--darned near a perfect stranger--at the service desk. I kept it and read it for nearly a month and we exchanged insights about it the next couple of times I went through his line. How cool is that?