Cults of Prax
Cults of Prax describes 15 cults and the gods they worship.
Steve Jackson reviewed Cults of Prax in The Space Gamer No. 27. Jackson commented that "Gods don't have to be effective to be important. Belief is the thing, and the interactions of social groups and differing beliefs in Cults of Prax is good fantasy reading even if you don't game at all."