This is a great book for everyone who has a website of any kind and wants to create more traffic for it. Online marketers, business executives would benefit most from it.
I really like the interview style, similar to Founders at Work, when applied to business books. You get the full excerpt and can interpret it yourself. It's great when for people who have been there done that and wants to share their knowledge. Of course, it's also marketing for themselves in a way.