I'm so happy I got this book, it's a lot of fun to read and to look back on an amazing game.
At the same time I can't really recommend this book, if you want a good game guide, just go to IGN. Very good overview with all the information you need.
This book is a bit odd in that (as far as I can recall) it doesn't go over all the main quests but then does mention some random side quests. As a game guide it's not very good but it does give you the most important tips and information.
For me it's a sort of collectors item of a game I love playing and I had a lot of fun looking back on the game with this book. I'm sure I'll flick through this book again in the future.