This is one of the better revised Clanbooks, if not the best. It finally gives the Settites some depth beyond "Ooooooh, were reeeaaally evil, and like snakes.".
It gives a "why" for what they do what they do, a method for their madness, and generally makes these guys interesting as either antagonists or player characters. Which is what a clanbook should do.
[5 of 5 Stars!]