Chess often revolves around pattern recognition. Once you have studied those patterns and know them by heart, it is a lot easier to see how to checkmate an opponent during a game. That’s what this book is about.
Of course you have not read anything new with this introductory text. But reading (or hearing) and knowing is often something different than doing it in practice. That is precisely why this is such a usefull book. You can practice a lot and will never forget the patterns you have learned.