Awhile ago I read an interesting article in the April 2003 issue of discover magazine by Steven Johnson, who also writes the blog stevenberlinjohnson. New social network software called InFlow is being used to analyze relationships between individuals in groups. Valdis Krebs also used the software to analyze patterns in Amazon.com data used to offer people books they might like based on books they've already read. He found a large group of books read only by conservatives and a large group of books read only by liberals. The only book he found to be widely read by both groups was What Went Wrong? by Bernard Lewis. This interested me enough to get the book and write a review essay of it on epinions.com.