The Rivan codex Book

Allow me to point out that this book is definitely not one to be read from start to finish. It's not that kind of book.

This is the book that you read when you want to gain a full understanding of everything concerning the world and its history. This is where you turn for religious teachings, for currency names and exchange rates.

If anyone ever decided that they wanted to make a game or a movie based on these books, then this is definitely the place that you want to look to get the specific information you would need to fully flesh out the world.

Basically, this book contains all of the interesting details about the world that would seem rather boring or unnecessary to a typical reader of the books.

So, as far as being a good read goes, this one just cannot even begin to compete. As far as being an interesting source of information about an excellent series, this is definitely top of the line material.