Learning to write clean code is hard work. It requires more than just the knowledge of principles and patterns. You must sweat over it. You must practice it yourself, and watch yourself fail. You must watch others practice it and fail. You must see them stumble and retrace their steps. You must see them agonize over decisions and see the price they pay for making those decisions the wrong way.
Be prepared to work hard while reading this book. This is not a “feel good” book that you can read on an airplane and finish before you land. This book will make you work, and work hard. What kind of work will you be doing? You’ll be reading code—lots of code. And you will be challenged to think about what’s right about that code and what’s wrong with it. You’ll be asked to follow along as we take modules apart and put them back together again. This will take time and effort; but we think it will be worth it.