The one at the back of Superfreakonomics is weird. I thought that suddenly I was reading a different book. It honestly doesn't feel like the same authors. Coul

The one at the back of Superfreakonomics is weird. I thought that suddenly I was reading a different book. It honestly doesn't feel like the same authors. Could it be a kind of ad? Can you approach a powerful publisher and buy yourself a chapter in a book that is likely to be a best seller?