This is one of the best introductory books on strategy that you will find. The rating is a lowered from outstanding, because it is very bad printing, which makes a lot of the illustrations unreadable. The cases are a bit dated, but you can live with that.

Please observe the subtitle if you intend to buy this book, as the Core Concepts is the short version of this book, without the cases.

All in all, recommended reading, even if it was expensive.