It is unusual for a philosophy book written by a famous professional philosopher to be a New York Times bestseller, but here is one: Michael Sandel's Justice: What's the Right Thing to Do?. It is based on Sandel's "Justice" course at Harvard, which has been one of the most popular courses at Harvard since it was first offered about twenty years ago. The class is usually very large, and in Fall 2007, it had 1.115 students, making it the largest class ever at Harvard. I can't imagine what it is like to be teaching such a huge class. I am teaching a 120-student class this semester, and it is already too large for me. My teaching has been improving though. This is the fifth week of the semester and I think I have learnt a few tricks to teach the class more effectively. But it is still not easy. Over a thousand students? No way!
By the way, I have skimmed through Sandel's book and got the impression that it is a very interesting introduction to moral philosophy.