I found this book to be handy and very well organized. It's definitely got some very useful information for Keepers. I agree with the other gentleman here, though, that this is a book players will want to avoid. This book is like a set of Torx-head wrenches - much of the time, you will probably not need it. However, every so often, there are times when it is PERFECT for what you need. If you are just starting to run the game, the creatures in the rulebook should hold you for quite a while, though.