This is one supplement I keep loaded in EVERY game I run. It's that good. I have some of my players using it as an extra source of spells and they are so well written, so carefully balanced, that one of them has spent over 2 hours now just trying to decide which way to take his next choice.
Not many modules can say they are that well done.
And if you don't want to use it as just a supplement, you can use it as the actual driving storyline "NPC", as it is a book that can talk to the players. How cool a concept is that?
[5 of 5 Stars!]