An interesting take on Competitive Strategy. The authors make the case that the only of the five forces that you should care about is the Barriers of Entry, and proceeds to rather long-winding try to prove it. Reading this in 2015 (the book is written in 2005), you easily detect that a lot of their reasoning and examples are plain wrong and in hindsight ridiculous. With that said, they have some interesting viewpoints, that could be valid to be aware of (even if I personally don't share them), so I have to give it a decent rating anyway.

Don't put it on the top of your reading list, but it should be read if for no other reason than to make you think in alternative ways.