The tools and information provided inside are very useful for a Game Master developing his own Pantheon of Gods. The author, Julie Dawson, breaks down some very complex concepts into short descriptions and suggestions. It covers the different needs of society and moves onto how to fit your deities within a structure that your players will understand. They are after all the representatives of your society while they are in character.
I found this to be an excellent resource. It is only 7 pages so it is not an encyclopedic book of Gods or deities by any stretch, I don't think it was intended to be. I think what this book provides the world-builder GM with is a resource he can go back to again and again. It is one of six books that never leaves my writing desks. I tend to like reference books that are easily accessible and not provide meaty substance. Pantheon Building is both.