This book wasn't the best offering I have ever had. It was very poorly written and hard to understand. This fact is proven when they are discussing the city roads and you can't follow a thing. On the other hand there is a load of information, but it is not worth it. I only got through have the book. It was incredibly hard to follow, and there were little explanations for the things that happened. It included information that was never neccesary. This book isn't worth picking up. Unfortunately there aren't many othr books on the case.