I bought this collection for my friend. He was very happy and in his view, the cards are an asset to the book: it is much maps, that is not printed in the book. In addition, some areas are more detailed than shown in the book. Thus, one can partly track backgrounds of action (eg tactical campaigns) better. In addition, a map of the travel of all the main characters included (you should of course only view if you have already read the novels). For fans this map collection is highly recommended!